CN1560281A - Purification agent for decolour in making sugar, purification method for declour of sugar juice and technology for directing producing fine white sugar thereof - Google Patents
Purification agent for decolour in making sugar, purification method for declour of sugar juice and technology for directing producing fine white sugar thereof Download PDFInfo
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- CN1560281A CN1560281A CNA2004100166446A CN200410016644A CN1560281A CN 1560281 A CN1560281 A CN 1560281A CN A2004100166446 A CNA2004100166446 A CN A2004100166446A CN 200410016644 A CN200410016644 A CN 200410016644A CN 1560281 A CN1560281 A CN 1560281A
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- 235000000346 sugar Nutrition 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 99
- 235000011389 fruit/vegetable juice Nutrition 0.000 title claims abstract description 18
- 238000000746 purification Methods 0.000 title claims description 53
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 title claims description 33
- 238000005516 engineering process Methods 0.000 title claims description 29
- 229930006000 Sucrose Natural products 0.000 title description 22
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 67
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229920000642 polymer Polymers 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 18
- -1 aluminum ions Chemical class 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 70
- 239000004411 aluminium Substances 0.000 claims description 57
- 238000004519 manufacturing process Methods 0.000 claims description 34
- 238000009923 sugaring Methods 0.000 claims description 34
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Chemical compound OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000005189 flocculation Methods 0.000 claims description 17
- 230000016615 flocculation Effects 0.000 claims description 17
- 239000011575 calcium Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 13
- 229910052791 calcium Inorganic materials 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- RKFMOTBTFHXWCM-UHFFFAOYSA-M [AlH2]O Chemical compound [AlH2]O RKFMOTBTFHXWCM-UHFFFAOYSA-M 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
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- 238000010612 desalination reaction Methods 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910020366 ClO 4 Inorganic materials 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000013543 active substance Substances 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
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- 238000004062 sedimentation Methods 0.000 claims description 2
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 5
- 150000005837 radical ions Chemical class 0.000 abstract description 2
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- 241000219310 Beta vulgaris subsp. vulgaris Species 0.000 abstract 1
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- 125000001814 trioxo-lambda(7)-chloranyloxy group Chemical group *OCl(=O)(=O)=O 0.000 abstract 1
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- 229960004793 sucrose Drugs 0.000 description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 18
- 238000004042 decolorization Methods 0.000 description 17
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- 239000002184 metal Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 239000013078 crystal Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- 239000005720 sucrose Substances 0.000 description 13
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- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 6
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
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- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000012452 mother liquor Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
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- CZMRCDWAGMRECN-UHFFFAOYSA-N Rohrzucker Natural products OCC1OC(CO)(OC2OC(CO)C(O)C(O)C2O)C(O)C1O CZMRCDWAGMRECN-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
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- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
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- 150000001413 amino acids Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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- 229910052979 sodium sulfide Inorganic materials 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
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- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 description 1
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a sugar-making decolorizing purifier, containing a high-molecular weight aluminum polymer shown by the general formula: Ala(OH)bXc, where X is selected from one or several ones of monovalent or bivalent acid radical ions: Cl-, ClO-, ClO4-, Br-, NO3-, SO42-, H2PO4-, HPO42-, HCOO- and CH3COO-, and the ratio of a to b to c = 1 : 2.1 : 0.9 -1 : 2.9 : 0.1. It contains 20-60% macromolecular polymer or colloid particles with molecular weight 5X10 to the power 4-1X10 to the power 5, 40-80% multinuclear hydroxy aluminic complex polymer with molecular weight less than 1X10 to the power 4, and 0-10% hexaccordianted hydrated aluminum ions or mononuclear hydroxy aluminic complex. Its basicity is 70-93%. It can be applied to decolorizing and purifying process of different-stage and different-color value sugar juices. It has high decoloration ratio, good effect of eliminate colloids, improving sugar product quality and can directly produce refined white sugars by sugarcane, sugar beets, etc.
Description
Technical field
The present invention relates to sugar industry, the technology of the decolouring purification agent that is specifically related to use in the sugar industry, the decolouring purification method of liquid glucose and raising sugar product quality, direct production castor sugar.
Background of invention
The decolouring of liquid glucose clarification (peace and quiet) problem is an important factor that is related to quality product in the sugar industry, is example with the cane sugar manufacture, the white sugar that any sugar refinery produced, and its colour all causes owing to sucrose crystal comprises a certain amount of pigment.These pigments are present in sucrose crystal with two kinds of forms: one, contain in xln; Its two, be adsorbed in the xln surface.In general, the molasses class pigment that is adsorbed in the xln surface can be removed with the method for the vapour of fetching water.Then can not adopt the method for the vapour of fetching water to remove for the pigment that contains in xln, they and sucrose crystal coexist.Therefore, the pigment impurity that contains in the crystallization of sucrose body the more, its colour is just high, quality product is just lower.Hence one can see that, and restriction or minimizing pigment impurity containing in xln are the fundamental ways that improves White Sugar Quality.
Why impurity such as pigment may contain in the crystallization of sucrose body, be because sucrose crystal in process of growth, the variation of conditions such as growing environment and internal structure thereof makes due to impurity such as pigment in the mother liquor syrup are wrapped in the xln.In other words, in the sucrose crystal impurity inclusion be formed with two prerequisites: the first, have impurity such as some pigments in the syrup mother liquor; The second, in the sucrose crystal process of growth, growing environment and crystalline internal structure have variation to a certain degree.Therefore, restriction or reduce pigment containing in sucrose crystal just must reduce stablizing of existing pigment in the syrup mother liquor and maintenance sucrose crystal growing environment and internal crystal structure as much as possible.
The pigment of syrup mother liquor comprises that mainly plant pigments and carbohydrate decompose pigment two big classes, and the former mainly is a phenolic compound to producing influential, belongs to the aromatic series pigment, and the latter produces in the production process, belongs to the non-aromatic pigment.In most cases in the sugar products based on plant pigments, control improperly under the situation carbohydrate in operation and decompose pigment and also can increase greatly.Some look source materials are arranged, and as some phenolic acid, reducing sugar and amino acid etc., they itself are colourless, but also can develop the color through catalyzed oxidation or with other substance reactions, influence the quality of sugar products.In addition, iron can generate dark complex compound with phenolic material, and the production and the quality control of sugar had very big influence.Therefore, Polyphenols thing, iron and materials such as oxygen, amino acid are that dark fundamental cause appears in sugar products.Reducing any one factor can both make the color of sugar products shoal.Because iron and oxygen are difficult to avoid in process of production, amino nitrogen is removed comparatively difficulty, seems important so effectively remove polyphenols in the present decolouring defecation method.
In addition, the colloidalmaterial in the syrup also has very big influence to the sugaring process.Most of colloid does not develop the color, but their existence also has remote effect to the colour of final sugar product.At first, colloidalmaterial can increase the viscosity of liquid glucose, increases filtration difficulty, makes that liquid glucose/syrup is difficult to handle in clarification, reduces peace and quiet effect, has increased the colour of sugar product indirectly.Secondly, there is the crystallization velocity that can influence sugar in excessive colloidal, overslaugh crystalline normal growth, even cause the crystal variation, increase the quantity of " containing body ".This also can cause the sugar product colour to increase downgrade.Therefore, in the peace and quiet process of liquid glucose/syrup, except the removal of pigment, it also is a very important aspect that the flocculation of other colloidal type materials is removed.
And the stability problem of sucrose crystal growing environment and internal crystal structure is directly related with the situation that the structure and the operation thereof of crystallizer move.The method that general people are taked is by strengthening the management of boiling process, and might make the parcel minimizing of impurity such as pigment, colloidalmaterial in the process of growth of sucrose crystal with more advanced crystallizer and working method.
Clarify (peace and quiet) technology about the decolouring of sugar in the world at present and mainly contain two developing direction: the one, be the decolouring clarification technique of feature with ion-exchange, the 2nd, be the decolouring clarification technique of feature with the membrane sepn.Wherein ion exchange method existing application aspect raw sugar production castor sugar, the ripening degree of its technology is slightly higher than membrane technique, but both costs are all higher, and the application conditions requirement is also high, also can't be applied to the raw sugar slurry at present and decolour clarification to make castor sugar.
More domestic cane sugar factories have carried out many improvement to traditional lime method, sulfurous method and carbonatation process, emerge many novel decolouring clarification techniques, as phosphoric acid air-float, ion-exchange, electrofloatation method etc., occur the chemical assistant of many clarification usefulness simultaneously.If any cane sugar factory use the discoloring agent that sugarcane juice and syrup are decoloured calcium phosphate, calcium sulfite to be arranged, the adding polymerization iron that also has, the wilkinite of modification, granule activated carbon (GAC) etc.Below be the report of the Closed Circulation in Sugar Production decolouring of some open source literature records:
1, " effect and promotion prospect thereof that A type decolouring finings uses in Closed Circulation in Sugar Production " (Fujian sugar industry, 1994 (1)) propose to utilize novel macroion finings G409 to improve peace and quiet system of sugarcane juice and the syrupy decolouring processing of increase, carry out rational boiling scheme and strictness and boil the sugar management, the purging operation of strict control massecuite.
2, (the sugarcane sugar industry of " utilizing multistage floating method to reduce the research of inferior method syrup colour ", 1995 (3)) propose the peace and quiet method of the multistage come-up of syrup and more can make inferior method syrup obtain higher percent of decolourization than ordinary single-stage floating method, the consumption of finings and addition manner all have to a certain degree influence to the syrup decolorization rate of various progression.
3, " ion exchange resin is to the high green syrup Study on Decolorization " (Guangxi University's journal: from section's version, 199621 (2)) adopt anionite-exchange resin that clarifying high green syrup decolouring is studied, the result shows that 290# macroporous strong basic resin decolorization is respond well.
4, " application of ultra-filtration technique in producing affination syrup " (Chinese beet sugar industry, 1999 (6)) studied under the different operating condition the former syrupy influence of stainless steel membrane ultrafiltration, improve syrupy decolouring and turbidity removal efficient by adding macroion finings G409, and improve its ultrafiltration performance.Compare with traditional technology, the technology that this flocculation combines with membrane filtration can significantly improve decolouring and turbidity removal efficient.Stainless steel membrane has acid and alkali-resistance, and is high temperature resistant, anti-embrittlement, the advantage of easy cleaning.
5, " discussion of the new finings of use in the press for extracting juice season syrup air supporting method " (sugarcane sugar industry, 1999 (3)) pass through shop experiment, selected solid finings C and be the inexpensive and effective finings of raw sugar slurry air supporting method, it decolours, the turbidity removal rate is suitable with traditional finings, but cost reduces about 40%.
6, " flocculation agent air float Research on effect " (Guangxi light industry, 2001 (2)) select that the PHP-3 flocculation agent carries out indoor syrup air supporting test in 11 kinds of flocculation agents of French X company and Japanese Jin-Floc-1150 and the homemade south for use, the result shows, anionic flocculant obviously is better than positively charged ion and flocculant in non-ion type, wherein again with AN923VHM and AN9565S the best.
7, " a kind of new syrup decolorization method " (Chinese patent application No.01142190) to utilize a kind of be that the ion-exchange fiber of skeleton carries out syrup decolorization with synthon, compare with at present general resin type ion-exchanger, have advantages such as specific surface area is big, exchange capacity is big, decolorizing efficiency is high, the recovery time is short, long service life.
From above-mentioned disclosed document as can be known, though above-mentioned various decolouring finings and decolouring defecation method respectively have advantage, but weak point is arranged also, ion exchange method is because import resin price costliness, and external blockade on new techniques, make China's sugar manufacturing industry answer the spent ion exchange resin Technology to fall behind, quality product does not have the breakthrough of matter; Solid decolorizer that has or finings source are wideless, and be influential to the back operation; Ultra-filtration technique is also owing to syrup viscosity height, to inconvenient operation.
The present inventor considers that polyphenols shows slightly acidic mostly, and is electronegative under neutral or weakly alkaline situation, and the purification agent institute of decolouring in this case is positively charged high more, and is strong more to the adsorptive power of polyphenols.Electronegative polyphenols can form stable complex compound by πDian Zi and the inorganic metal atom on Sauerstoffatom or the ring.In addition, polyphenols can also be removed by forming hydrogen bond with other materials.Utilize these character can remove aldehydes matter in the sugar products effectively.The high-molecular-weight poly aluminum compound has characteristics such as molecular weight height, high adsorption capacity, electric density height, the efficient aldehydes matter of adsorption zone negative charge, even might follow the aldehydes matter complexing, and a large amount of hydroxyls also can form hydrogen bond with phenolic material in the poly-aluminum compound, is removed together when precipitation.Simultaneously, the high positive charge ion of macromolecule can also greatly reduce the electrostatic double layer of (comprising macromole pigment colloid) of electronegative colloid in the solution, makes it take off steady cohesion, reaches the peace and quiet effect that efficient decolorizing removes glue.Based on above-mentioned consideration, the present inventor has finished the present invention by concentrating on studies on the basis of a large amount of tests.
Therefore, an object of the present invention is to provide a kind of novel sugaring decolouring purification agent.
Another object of the present invention provides with this novel sugaring decolouring purification agent carries out the method that liquid glucose decolours, removes glue (peace and quiet).
A further object of the present invention provides with this novel sugaring decolouring purification agent the sugar product quality is improved; Technology from raw material direct production castor sugars such as sugarcane, beets.
Summary of the invention
The invention provides a kind of sugaring decolouring purification agent, comprise high molecular aluminium polymer with following general formula:
Al
a(OH)
bX
c
In the formula, X is for being selected from Cl
-, ClO
-, ClO
4 -, Br
-, NO
3 -, SO
4 2-, H
2PO
4 -, HPO
4 2-, HCOO
-And CH
3COO
-One or more monovalencies or dihydric acid radical ion, a: b: c=1: 2.1: 0.9～1: 2.9: 0.1.
In the contained high molecular aluminium polymer of described sugaring decolouring purification agent, comprising 20～60% molecular weight is 5 * 10
4～1 * 10
5Between the polymerization macromole or colloidal particle, 40～80% molecular weight less than 1 * 10
4The polymkeric substance of multinuclear hydroxy aluminum title complex and 0～10% six water distributions close aluminum ion or monokaryon hydroxyl aluminum complex.
The basicity of described high molecular aluminium polymer is 70～93%.
In the sugaring of the present invention decolouring purification agent, except comprising high molecular aluminium polymer, also can randomly comprise decoloring assistant and/or auxiliary material with as above general formula.
Described decoloring assistant can be phosphoric acid or sulfurous gas; Described auxiliary material is one or more materials that are selected from flocculation agent and pH regulator agent, high price molysite, silicate and the tensio-active agent.
The peace and quiet sugar of system look of the present invention takes off in the agent, and described high molecular aluminium polymer can adopt the method that comprises the steps to make:
(1) aluminium block deoxidation layer;
(2) aluminium block of deoxidation layer is immersed in 0.5～6N acid solution to the reaction fierceness;
(3) reacted aluminium block is immersed in the metal mixture that has covered water to wrapping up aluminium block fully;
(4) aluminium block of surface parcel is immersed in 0.5～4N acid solution to solution proportion and reach 10～12B
eMore than;
(5) take out aluminium block, the content of residual heavy metal is below 0.2ppm in the control solution.
Take above-mentioned steps, make the aluminium polymer discoloring agent of liquid state.Solution dehydrates drying with after the residual heavy metal amount of control can make solid-state shape (white powder) product.
Above step (1) can adopt the method for artificial or mechanical wiping aluminium block surface oxide layer.
Above step (2) can be put into aluminium block the acid solution of the 0.5N～6N of metering and react, and acid solution can be that single aqueous acid also can be to mix aqueous acid, is preferably HCl and/or H
3PO
4, be more preferred from HCl and H
3PO
4The aqueous solution.The concentration of acid solution is preferably 1-6N, is more preferred from 2-5N, and the best is 2.5-4.5N, in solution, begin vigorous reaction with aluminium block till.Reaction times is decided about 30 seconds to one minute on aluminium block composition difference.Purpose is activation aluminium block surface.
Above step (3) places metal mixture to handle 5 seconds-40 seconds the aluminium block after the activation.Metal mixture is made up of a small amount of iron powder, zinc powder, manganese powder, copper powder and mercury.The ratio of aluminium and metal mixture is 20: 1.In order not allow the mercury in the metal mixture in air, volatilize, in filling the container of metal mixture, put into water, make it all cover metal mixtures.
Above step (4), the aluminium block after will handling in metal mixture is inserted in the acid solution, makes acid solution soak full aluminium block fully.Acid solution can be that single aqueous acid also can be to mix aqueous acid, is preferably HCl and/or H
3PO
4The aqueous solution is more preferred from HCl and H
3PO
4The aqueous solution.The concentration of acid solution can be 0.5-4N, is good with 1-3N, and concrete concentration depends on the circumstances.The ratio of metallic aluminium and acid solution is 1: 1～1: 20, and with 1: 3-1: 6 is good.The acid solution of every kilogram of metal adding is the 1-20 liter.Entire reaction continues to aluminium or acid solution is exhausted, and proportion is at 8～12B
eShi Jiben finishes.This moment, the pH value of solution was 1.5～3.8.
As required, the available alkaline matter in reaction back is adjusted to 3.8～5.5 with the pH value.
Metal content after reaction finishes is about iron 7ppm, zinc 10ppm, mercury 5ppm, about manganese 1ppm.
The processing of micro heavy can use sodium sulphite to be raw material in the step (5), sodium sulfide solution was mixed stirred for several minute to tens of minutes with step (4) gained solution, generate metallic sulfide, add the activated carbon agitation and filtration then, also activated carbon can be made into reaction column, solution removes wherein kish by reaction column.Product heavy metal content after the processing is lower than 0.2ppm, is up to state standards-water conditioner polymerize aluminum chloride standard-required.
When the acid solution that participates in reaction was 0.9 times of aluminium, the basicity of final product probably was 70%, and containing 20% molecular weight approximately is 5 * 10
4～1 * 10
5Between polymerization macromole or colloidal particle, about 70% molecular weight is less than the polymkeric substance of 10,000 multinuclear hydroxy aluminum title complex, and about 10% hexa-coordinate hydrated aluminum ion or monokaryon hydroxyl aluminum complex.And the acid solution that participates in reaction is when being 1/3 left and right sides of aluminium add-on, the finished product basicity is about 90%, molecular weight can account for 60% greater than 50,000 product, and molecular weight accounts for 40% less than the polymkeric substance of 10,000 multinuclear oxyaluminum title complex, and hydrated aluminum ion or monokaryon oxyaluminum title complex do not exist substantially.
With sugaring of the present invention decolouring purification agent carry out liquid glucose decolouring clarification, the method for coming unstuck comprises the steps:
(1) by weight, the sugaring decolouring purification agent that adds liquid glucose total amount 0.02-3.0%;
(2) with the pH regulator of mixture at 5.5-9.5;
(3) in 30-90 ℃ of reaction 2 minutes to 1 hour;
(4) separation obtains clarifying liquid glucose.
Liquid glucose of the present invention decolours, removes in the glue defecation method, and the consumption of sugaring decolouring purification agent can be the 0.0002-3.0% (weight) of liquid glucose total amount, is preferably 0.1-2.0% (weight), is more preferred from 0.05-1.0% (weight).
Liquid glucose of the present invention decolours, removes the glue defecation method to carry out generally being adjusted in 5.5-9.5 for good under neutrality or weak basic condition, is preferably 7.0-8.0.If it is relatively poor that pH is lower than 5.5 effects, be higher than 9.5 and difficult separation of product or liquid glucose impurity height may occur.
The alkaline matter of regulating the pH use is selected from and contains OH
-Anionite-exchange resin or NaOH, Na
2CO
3, NaHCO
3, Ca (OH)
2, saccharification calcium etc.
The liquid glucose clarify and decolorize removes the glue reaction can carry out under 30-90 ℃ of temperature, is preferably 60-80 ℃.If temperature is lower than 30 ℃, speed of response is slower; Temperature may increase the content of impurity greater than 90 ℃.
The time that the liquid glucose clarify and decolorize removes the glue reaction is 2 minutes to 1 hour, is preferably 5-30 minute, is more preferred from 5-10 minute.
The method of separating clarifying liquid glucose can adopt sedimentation, come-up, filtration, centrifugal etc.Wherein, filter method can adopt Plate Filtration.
Inferior method clarification is one of wider technology of a use in the cane sugar manufacture field, many sugar refinery all adopt this technology to come juice,liming, aspect its protein in handling syrup and cerosin, the sugarcane fat effect is preferably arranged, be better than the carbon method aspect comprehensive cost and the environmental protection simultaneously.But it is bad that the weakness of its maximum is exactly the effect of decolouring, and syrup is second-rate.Be that membrane technique or ion exchange technique all are difficult to directly apply to production arable land, inferior method sugar refinery castor sugar at present.And sugaring decolouring purification agent of the present invention still keeps extraordinary decolorizing effect to ropy syrup, and can make by sugarcane direct production refined sugar becomes possibility.
The carbon method technology that beet-sugar factory and part cane sugar factory use is because the flow process of having passed through low-temperature high-alkali, it to sugarcane fat, sugarcane is cured and the place to go effect of pigment is more much better than inferior method technology, some difficulty aspect the filter mud processing just.Because carbon method technology syrup quality is better, use sugaring decolouring purification agent of the present invention also can decolour to it, the direct production castor sugar, usage quantity still less, the decolouring burden is lighter.
No matter be at cane sugar factory or at beet-sugar factory, no matter use inferior method technology or carbon method technology, improve sugar product quality and minimizing for sugar part loss, it all is obligato that colloidal is removed.Inferior method technology is not good to the colloidal removal effect, and carbon method technology is better to the colloid removal effect, but under high-alkali situation, the part calcium salt can become colloidal sol, can not precipitate.Decolouring purification agent of the present invention has good effect of removing owing to have very high positive charge density to the negative electricity colloid in syrup/liquid glucose.This is very favorable to raising sugar product quality, direct production castor sugar.
Usefulness provided by the invention comprises the technology of the sugaring decolouring purification agent direct production castor sugar of high molecular aluminium polymer, comprises following steps:
(1) adds 1%-3% decolouring purification agent in the floating clear juice behind raw sugar slurry or low-temp phosphorus floatation, regulate the pH value to 6-8, stir decolouring and remove glue;
(2) come-up separate refinery liquor;
(3) refinery liquor desalination, boil after sugar, the purging refined sugar.
Above-mentioned raw sugar slurry refers to that the temperature in the existing procedure of sugar refinery is 80-90 ℃ a raw sugar slurry; Floating clear juice temperature behind the low-temp phosphorus floatation is 45-60 ℃, and clear juice temperature is 90-100 ℃ before concentrating.This decolouring purification agent can both decolour except that the glue clarifying treatment effectively 45-90 ℃ of temperature range.
Direct production castor sugar technology of the present invention also can add one or more decoloring assistants that are selected from phosphoric acid, saccharification calcium and flocculation agent in the decolouring step.
Direct production castor sugar technology of the present invention is isolated refinery liquor and scum silica frost in come-up.Scum silica frost can treated recovery sugar, reclaims sugar and can return former flow process.
Sugaring decolouring purification agent of the present invention comprises the high molecular aluminium polymer, and its molecular-weight average is 1-6 ten thousand.This high molecular aluminium polymer high adsorption capacity, the electric density height, the efficient aldehydes matter of adsorption zone negative charge, and can with the aldehydes matter complexing, hydroxyls a large amount of in the aluminium polymer can form hydrogen bond with aldehydes matter, are removed together when precipitation.Simultaneously, the high positive charge ion of macromolecule can also greatly reduce the electrostatic double layer of (comprising macromole pigment colloid) of electronegative colloid in the solution, makes it take off steady cohesion, improves decolorizing effect.Hydrogen phosphate in the aluminium polymer, dihydrogen phosphate etc. can with the calcium ion Cheng Jian of electronegative pigment colloid surface, help pigment, colloidal absorption, also can form the calcium phosphate network structure with calcium ion, suspended particles in the solution are captured, carry out the secondary flocculation with flocculation agent again, thereby clarifying effect is increased.
Facts have proved, sugaring of the present invention decolouring purification agent is applicable to different sugar refinery, (raw sugar of clear juice, raw sugar slurry, Hui Rong), syrup/syrupy peace and quiet decolouring with different colours are handled to be in different steps, colour after the decolouring all can be stabilized in (colour of wherein returning molten raw sugar can be reduced to 80IU) between the 100-300IU, and percent of decolourization can reach 90-95%.
Sugaring decolouring purification agent of the present invention is especially all very good to the percent of decolourization of ropy syrup, syrup, raw sugar, and is particularly outstanding to the decolorizing effect of some difficult removal pigments.Compare with ion exchange technique with membrane technique, it not only can be used for clearly juice, the decolouring of former syrup, can be used for also that those are of poor quality, colour, turbidity and high thick syrupy decolouring and the clarification of colloidal content.And membrane technique and ion exchange technique can only be returned at raw sugar at present and used in the molten slurry, must could use after removing many impurity behind the primary crystallization, and general percent of decolourization is 75%～80%.
Carry out the liquid glucose clarify and decolorize with sugaring of the present invention decolouring purification agent, method is simple, and condition is easily grasped, and the investment of equipment is required low, is applicable to the various sugaring flow processs in all kinds of sugar refinery.
With sugaring of the present invention decolouring purification agent can improve sugar product quality, make sugarcane, beet direct production arable land castor sugar, finished the once great innovation on the castor sugar production technique.
(1) the castor sugar production cost reduces significantly
Since the castor sugar production process shortened near half, the sugared energy consumption of ton reduces significantly, and is original with regard to very low conventional industries for this profit of sugaring, is undoubtedly a great change.
(2) sugar yield of castor sugar production technique improves
Because adopt neutrality to boil sugar, purity of syrup increases, and only through a step crystallization, the original two step crystallizations of the loss ratio of sugar in crystallisation process reduce, thereby the also corresponding raising of productive rate of sugar.
(3) simply to reach adaptability strong for process, thereby the raising that has brought the stability of technology
Compare with technology such as ion-exchanges with membrane technique, the superiority of this technology maximum is exactly that process is simple and not high to the conditional request of technology, thereby the variation of various working conditions had better adaptability, this is that present membrane technique can't be compared with ion exchange technique.
(4) investment economizes most
Present technique is used for castor sugar production, only needs a step crystallization, and not high to equipment requirements, only increases small number of devices on original inferior method, carbon method production unit basis, boiling pan is changed stainless steel and got final product.Therefore compare with production castor sugar technology such as present advanced in the world ion-exchange, membrane sepn, can save a large amount of facility investments and land seizure. the overall investment minimum.And, do not have the regeneration problem of resin and film, can not increase extra environmental protection negative but.Owing to decolour, except that the peace and quiet effect of glue is remarkable, also can simplify the processing unit and the clarification operation of front, thereby reduce the cost and the discharge of wastewater of front equipment, operation.
The simple declaration of accompanying drawing
Fig. 1 is the refine sugar nuclear magnetic resonance spectrum of contained high molecular aluminium polymer in the discoloring agent of the present invention.Among the figure, approximately the height of 2ppm, strong peak are AlO
6The resonance absorption of (alumina octahedral), and near the small peak of 69ppm is AlO
4The resonance absorption of (aluminum-oxygen tetrahedron).
Fig. 2 A-D is the present invention's electron microscope scanning collection of illustrative plates of contained high molecular aluminium polymer in the decolouring purification agent of refining sugar.
Fig. 3 is with the process flow sheet of sugaring decolouring purification agent of the present invention with sugarcane, beet direct production refined sugar.
Embodiment
The present invention is further elaborated below in conjunction with embodiment, but these embodiment never are any limitation of the invention.Any change that those skilled in the art are done in to the invention process under the enlightenment of this specification sheets all will drop in the scope of claims.
The preparation of the sugaring decolouring purification agent of embodiment 1 pbz polymer amount aluminium polymer
Raw material is prepared:
(1) metallic aluminium: shape specification is not limit, and mostly is block, and purity is more than 97%.
(2) metal mixture: a small amount of iron powder, zinc powder, manganese powder, copper powder, mercury.
(3) hydrochloric acid: salable product.
(4) sodium sulphite (technical grade)
(5) activated carbon powder (technical grade)
Step:
(1) manually wipes the zone of oxidation on aluminium block surface, be as the criterion to see aluminium essence.
(2) to put into concentration fully be that 0.5-6N HCl solution soaked for 30 seconds to the aluminium block that will remove surface oxide layer, and the aluminium block surface produces a large amount of bubbles, makes the aluminium block activation.
(3) aluminium block after will the activating about 5-40 of metal mixture second of placing surface coverage water.
(4) after the processing, aluminium block is inserted in the 0.5-4N HCl solution, make solution soak full aluminium block fully.See the aluminium block surface and generate many small bubbles, reaction continues to aluminium or hydrochloric acid is exhausted, and proportion is about 10, and the pH value of solution is about 2.
(5) react the available alkaline matter adjust pH to 3.8 in back～5.5 as required.
(6) processing of other micro heavies.Metal content after the product reaction finishes is about about iron 7ppm, zinc 10ppm, mercury 5ppm, manganese 1ppm.Sodium sulfide solution is mixed stirring 10 minutes with product, generate sulfide, add the activated carbon agitation and filtration then, remove kish wherein.Liquid product after the processing is up to state standards-water conditioner polymerize aluminum chloride standard-required.
(7) liquid residual quantity of heavy metal is up to standard is introduced evaporating pot, is boiling off moisture below 110 ℃, forms white transparent crystals, is processed into white powder with pulverizer.
(8) above liquid product or white powder all can also can be used as sugaring decolouring purification agent with decoloring assistant and/or auxiliary material directly as sugaring decolouring purification agent.
The molecular weight analyse of embodiment 2 high molecular aluminium polymers
Method: nmr analysis cooperates scanning electronic microscope examination
The result:
1. nmr analysis
The white powder that sample: embodiment 1 makes, each portion of colourless transparent liquid
Instrument and testing method: the German Bruker superconduction nuclear magnetic resonance spectrometer AVANCE 400digital NMR of company.
27Al resonant frequency 104.26MHz surveys with the CP/MAS probe
27Al solid spectrum, multinuclear probe BBO surveys
27Al liquid spectrum, object of reference is the aqueous solution of 1M AlCl.
Measurement result:
(1) CP/MAS of embodiment 1 pressed powder
27The Al-NMR spectrum: take the influence of spinning side band not consider from this kind spectrum of different rotating speeds (3K, 5K, 7K), the resonance absorption of Al meets the situation of two kinds of different structure aluminium in the polymerize aluminum chloride in two samples at visible approximately 2ppm and 69ppm place.The height at about 2ppm place, strong peak are AlO
6The resonance absorption of (alumina octahedral), and the small peak at 69ppm place is AlO
4The resonance absorption (see figure 1) of (aluminum-oxygen tetrahedron).
(2) embodiment 1 liquid sample
27Al (OH) title complex still shows two states.0.0 resonance peak is Al (H
2O)
6 3+And the characteristic peak of other monokaryon hydroxyl coordination ion, near it alumina octahedral (AlO
6) resonance peak, and the characteristic peak of 62.9ppm will occur when rare in that primary liquid or the solid aqueous solution are suitable, by multinuclear component Al
13O
4(OH)
24(H
2O)
12 7+Cause.The broad peak at about 70ppm place is the background peaks (see figure 1) that metallic aluminium produces in the probe.
2. scanning electronic microscope examination the results are shown in Figure 2 (A-D).
Conclusion: the present invention refines sugar, and the molecular-weight average of high molecular aluminium polymer is 1-6 ten thousand in the decolouring purification agent.
Embodiment 3 different al: the preparation of the aluminium polymer of OH: Cl and molecular weight distribution thereof
Raw material: see embodiment 1.
Step 1 is identical with the above, and the HCl with 5N in the step 2 handles controlling reaction time, suitably handle with metal mixture in the step 3, adopt the HCl solution of 2N in the step 4, the ratio of aluminium and hydrochloric acid soln is 1: 8, and control reaction temperature and time are exhausted up to aluminic acid.Final product comprises about 60% molecular weight after measured and is higher than 50,000 polymerization macromole or colloidal particle, and about 40% molecular weight does not have six water distributions to close aluminum particulate and monokaryon hydroxyl aluminum complex less than 10000 multinuclear oxyaluminum title complex.Basicity is 90%.Can be made into pressed powder as required.
Embodiment 4 different al: the preparation of the aluminium polymer of OH: Cl and molecular weight distribution thereof
Step 1 is identical with the above, and the HCl with 3N in the step 2 handles controlling reaction time, suitably handle with metal mixture in the step 3, adopt the HCl solution of 2N in the step 4, the ratio of aluminium and hydrochloric acid soln is 1: 15, and control reaction temperature and time are exhausted up to aluminium.Final product comprises about 20% molecular weight after measured and is higher than 50,000 polymerization macromole or colloidal particle, and about 70% molecular weight is less than 10000 multinuclear oxyaluminum title complex, and aluminum particulate and monokaryon hydroxyl aluminum complex are closed in 10% six water distributions.Basicity is 70%.
Embodiment 5
Except in step (1) and (4), replacing half hydrochloric acid with phosphoric acid, be prepared by the method for embodiment 1, in the sugaring decolouring purification agent that obtains, the high molecular aluminium polymer is general formula Al
a(OH)
bX
cMiddle X is Cl
-+ H
2PO
4 -Compound.
Embodiment 6 Australia raw sugar Decolorant Test
Test raw material: Australia raw sugar
Test method:
With the liquid glucose of 1 kilogram of water Hui Rong to 55Bx of raw sugar, get 500ml and be heated to 70-75 ℃.After adding a certain amount of embodiment 1 decolouring purification agent, regulate pH to 8.0, add flocculation agent 4ppm with saccharification calcium.After stirring, through filter paper filtering, filtrate is measured colour under the 560nm wavelength.
The results are shown in Table 1.
Table 1
| Decolouring purification agent addition | ||||||
| ??0 | ??0.1％ | ??0.2％ | ??0.3％ | ??0.4％ | ||
| First group | Colour (IU 560) | ??821 | ??526 | ??402 | ??288 | ??271 |
| Percent of decolourization (%) | ??—— | ??35.9 | ??51.0 | ??64.9 | ??67.0 | |
| Phenolic material (mg/KgBx) | ??139.97 | ??—— | ??—— | ??41.74 | ??40.6 | |
| Dephenolize rate (%) | ??—— | ??—— | ??70.2 | ??76.1 | ||
| Second group | Colour (IU 560) | ??962 | ??639 | ??471 | ??377 | ??272 |
| Percent of decolourization (%) | ??——“ | ??33.6 | ??49.0 | ??61.0 | ??71.7 | |
| Phenolic material (mg/KgBx) | ??146.52 | ??107.40 | ??80.14 | ??44.84 | ??20.22 | |
| Dephenolize rate (%) | ??—— | ??26.7 | ??45.3 | ??69.4 | ??86.2 | |
| The 3rd group | Colour (IU 560) | ??960 | ??613 | ??462 | ??320 | ??238.1 |
| Percent of decolourization (%) | ??—— | ??361 | ??51.9 | ??66.6 | ??75.2 | |
| Phenolic material (mg/KgBx) | ??148.20 | ??101.96 | ??68.62 | ??38.08 | ??16.45 | |
| Dephenolize rate (%) | ??—— | ??31.2 | ??53.7 | ??74.3 | ??88.9 | |
The embodiment raw sugar Decolorant Test that extra large sugar refinery provides of reaching the clouds in 7 Shandong
Be made into 55 ° of Bx syrup for 1 kilogram with the Shandong raw sugar that extra large sugar refinery provides that reaches the clouds, get 500ml and be heated to 70-75 ℃, regulate pH to 7.0 with saccharification calcium liquid.Add a certain amount of decolouring purification agent that makes by embodiment 1, transfer pH7.0 again, add 4ppm PAM, the after-filtration that stirs is got filtrate and is measured colour.The results are shown in Table 2.
Table 2
| Decolouring purification agent addition | ??0 | ??0.2％ | ??0.4％ | ??0.6％ | ??0.8％ | ??1％ |
| Colour (IU) | ??1923 | ??699 | ??387 | ??233 | ??168 | ??116 |
| Percent of decolourization (%) | ??—— | ??64 | ??80 | ??88 | ??91 | ??94 |
The land-reclaimable group in embodiment 8 Guangxi good boundary sugar refinery raw sugar slurry Decolorant Test (sulfurous method)
The raw sugar slurry 3000mL that the land-reclaimable group in Guangxi good boundary sugar refinery is provided is heated to 85 ℃, measures 500ml as sample, adds a certain amount of decolouring purification agent that makes by embodiment 1, be neutralized to pH=7.0 with saccharification calcium, add the flocculation agent PAM of 3ppm, after stirring, filter, survey the colour of filtrate.The results are shown in Table 3.
Table 3
| Decolouring purification agent addition | ??0 | ??0.2％ | ??0.5％ | ??0.8％ | ??1％ | ??2％ |
| Colour (IU) | ??1864 | ??968 | ??658 | ??414 | ??265 | ??147 |
| Percent of decolourization (%) | ??—— | ??48 | ??65 | ??78 | ??86 | ??92 |
Embodiment 9 Nanning candy paper factories two carbon full charges are filtered juice Decolorant Test (carbonatation process) not
Two carbon full charge juice are heated to 75 ℃, measure the sample of 500mL, add a certain amount of decolouring purification agent that makes by embodiment 1, be neutralized to pH=8.0, add 1ppm flocculation agent PAM, after stirring, filter, survey the colour of filtrate with saccharification calcium.The results are shown in Table 4.
Table 4
| Decolouring purification agent addition | ????0 | ????0.05％ | ??0.1％ | ??0.2％ | ??0.3％ | ??0.4％ |
| Colour (IU) | ????751 | ????368 | ??270 | ??173 | ??105 | ??45 |
| Percent of decolourization (%) | ????—— | ????51 | ??64 | ??77 | ??86 | ??94 |
The land-reclaimable group in embodiment 10 Guangxi good boundary sugar refinery defeco-sulfitated juice Decolorant Test
The defeco-sulfitated juice in the land-reclaimable group in Guangxi good boundary sugar refinery is heated to 70 ℃, measures the 1000mL sample, according to the form below adds the product of a certain amount of embodiment 1 and embodiment 5 respectively, be neutralized to pH=7.0 with saccharification calcium, add 2ppm flocculation agent polyacrylamide (PAM), filter the back measured color value, the results are shown in Table 5.
Table 5
| Decolorizing effect | Embodiment 1 product add-on | Embodiment 5 product add-ons | ||||
| ??0 | ??0.05％ | ??0.10％ | ??0 | ?0.05％ | ??0.10％ | |
| Colour (IU 560) | ??1043 | ??782 | ??723 | ??1043 | ??737 | ??626 |
| Percent of decolourization (%) | ??—— | ??25 | ??31 | ??—— | ??30 | ??40 |
The land-reclaimable group in embodiment 11 Guangxi good boundary sugar refinery defeco-sulfitated juice Decolorant Test
The defeco-sulfitated juice in the land-reclaimable group in Guangxi good boundary sugar refinery is heated to 70 ℃, measures the 1000mL sample, according to the form below adds the product of a certain amount of embodiment 1 and embodiment 5 respectively, be neutralized to pH=7.0 with saccharification calcium, add 2ppm flocculation agent polyacrylamide (PAM), filter the back measured color value, the results are shown in Table 6.
Table 6
| Decolorizing effect | Embodiment 1 product add-on | Embodiment 5 product add-ons | ||||
| 0 | ??0.05％ | ??0.10％ | ?0 | ?0.05％ | ?0.10％ | |
| Colour (IU 560) | 1230 | ??992 | ??865 | ?1230 | ?723 | ?723 |
| Percent of decolourization (%) | —— | ??19 | ??30 | ?—— | ?41 | ?41 |
Embodiment 12 bright positive sugar refinery syrup remove the glue test
Syrup is heated to 85 ℃, measures the 500mL sample, add the decolouring purification agent of different amount embodiment 1 gained, be neutralized to pH=7.0, add the flocculation agent PAM of 3 ppm, filter the back and survey colloidal content with the alcohol coacervation with saccharification calcium.
The alcohol coacervation:
Getting 20g sample constant volume is 100mL, the mixing after-filtration, regulate pH4-4.5, draw 10mL to Erlenmeyer flask, add 100mL95% ethanol and 5mL ether, refluxed 30 minutes, with G4 flint glass F sand core funnel suction filtration, precipitation is dried down for 100 ℃ with ethanol, ether and water mixed liquid 80-100mL gradation washing, and cooling is weighed.
Colloidal content (%Bx)=10a/ (w * Bx)
In the formula: a---colloidal precipitation thing heavy (gram)
W---example weight (gram)
Bx---sample hammer degree
Measurement result sees Table 7.
Table 7
| The discoloring agent add-on | ????0 | ????0.2％ | ????0.5％ | ????0.8％ |
| Colloidal content (%Bx) | ????2.47 | ????1.59 | ????1.11 | ????0.81 |
| Colloid clearance (%) | ????—— | ????35.6 | ????54.6 | ????67.2 |
Embodiment 13 bright positive sugar refinery raw sugar are starched inferior method direct production refined sugar test
Raw sugar is starched 5000mL be heated to 85 ℃, add the 1.8% decolouring purification agent that makes by embodiment 1 and contain P
2O
5The phosphoric acid of 250ppm, usefulness saccharification calcium obtains refinery liquor with pH regulator to 7.0 after the come-up, and the colour of this refinery liquor is passed through desalination, is boiled sugared operation less than 300IU, obtains refined sugar 1809 grams.Discard behind the treated recovery sugar of scum silica frost, reclaim sugar and return former flow process.Gained refined sugar quality meets standard GB 317-1998 after the purging.
The contrast of syrup quality sees Table 8 before and after the air supporting.
Table 8
| Colour (IU) | Turbidity | ????pH | Letter purity (%) | |
| The raw sugar slurry | ????1566 | ????1230 | ????6.81 | ????83.6 |
| Refinery liquor | ????235 | ????51 | ????7.04 | ????86.9 |
The refined sugar quality index that cooks with refinery liquor sees Table 9.
Table 9
| This test products | Standard GB 317-1998 | |
| Sucrose branch (%) | ????99.8 | ????99.8 |
| Reducing sugar content (%) | ????0.02 | ????0.03 |
| Electricity is led ash content (%) | ????0.01 | ????0.03 |
| Weight loss on drying (%) | ????0.04 | ????0.06 |
| Colour (IU) | ????23 | ????30 |
| Turbidity (degree) | ????0.4 | ????3 |
| Water insoluble impurity (mg/kg) | ????18 | ????20 |
More than be that raw sugar is starched inferior method direct production castor sugar test.And carbon method direct production castor sugar, its technical process is similar to inferior method, littler, the easier enforcement of difficulty.
Claims (16)
1. sugaring decolouring purification agent comprises the high molecular aluminium polymer with following general formula:
Al
a(OH)
bX
c
In the formula, X is for being selected from Cl
-, ClO
-, ClO
4 -, Br
-, NO
3 -, SO
4 2-, H
2PO
4 -, HPO
4 2-, HCOO
-And CH
3COO
-One or more acid ions, a: b: c=1: 2.1: 0.9～1: 2.9: 0.1.
2. it is 5 * 10 that sugaring as claimed in claim 1 decolouring purification agent, wherein said high molecular aluminium polymer comprise 20～60% molecular weight
4～1 * 10
5Between the polymerization macromole or colloidal particle, 40～80% molecular weight less than 1 * 10
4The polymkeric substance of multinuclear hydroxy aluminum title complex and 0～10% six water distributions close aluminum ion or monokaryon hydroxyl aluminum complex.
3. sugaring decolouring purification agent as claimed in claim 1, the basicity of wherein said high molecular aluminium polymer is 70～93%.
4. sugaring decolouring purification agent as claimed in claim 1 wherein also comprises other decoloring assistant and/or auxiliary material.
5. sugaring decolouring purification agent as claimed in claim 4, wherein said decoloring assistant is phosphoric acid and/or sulfurous gas; Described auxiliary material is one or more materials that are selected from flocculation agent and pH regulator agent, high price molysite, silicate and the tensio-active agent.
6. the method for carrying out the liquid glucose clarify and decolorize, coming unstuck with the described sugaring decolouring of claim 1 purification agent is characterized in that comprising the steps:
(1) by weight, the sugaring decolouring purification agent that adds liquid glucose total amount 0.02-3.0%;
(2) with the pH regulator of mixture at 5.5-9.5;
(3) in 30-90 ℃ of reaction 2 minutes to 1 hour;
(4) separation obtains clarifying liquid glucose.
The alkaline matter of regulating the pH use is selected from and contains OH
-Anionite-exchange resin or NaOH, Na
2CO
3, NaHCO
3, Ca (OH)
2, saccharification calcium etc.
7. method as claimed in claim 6, the consumption of wherein said sugaring decolouring purification agent is 0.1-2.0%.
8. method as claimed in claim 6, wherein said pH regulator are 7.0-8.0.
9. method as claimed in claim 6, the adjusting of wherein said pH are used and are contained OH
-Anionite-exchange resin or be selected from NaOH, Na
2CO
3, NaHCO
3, Ca (OH)
2, saccharification calcium alkaline matter.
10. method as claimed in claim 6, wherein said temperature of reaction are 60-80 ℃.
11. method as claimed in claim 6, the wherein said reaction times is 5-10 minute.
12. method as claimed in claim 6, wherein said separation liquid glucose adopts sedimentation, come-up, filtration and centrifuging.
13. method as claimed in claim 12, Plate Filtration is adopted in wherein said filtration.
14. the technology of direct production refined sugar is characterized in that comprising following steps:
(1) adds 1%-3% decolouring purification agent in the floating clear juice behind raw sugar slurry or low-temp phosphorus floatation, regulate the pH value to 6-8, stir decolouring and remove glue;
(2) come-up separate refinery liquor;
(3) refinery liquor desalination, boil after sugar, the purging refined sugar.
15. direct production refined sugar technology as claimed in claim 14 wherein also adds one or more decoloring assistants that are selected from phosphoric acid, saccharification calcium and flocculation agent in the decolouring step.
16. direct production refined sugar technology as claimed in claim 14 wherein also when come-up is isolated refinery liquor, reclaims sugar and returns former flow process from scum silica frost.
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|---|---|---|---|
| CN 200410016644 CN1271218C (en) | 2004-03-01 | 2004-03-01 | Purification agent for decolour in making sugar, purification method for declour of sugar juice and technology for directing producing fine white sugar thereof |
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|---|---|---|---|
| CN 200410016644 CN1271218C (en) | 2004-03-01 | 2004-03-01 | Purification agent for decolour in making sugar, purification method for declour of sugar juice and technology for directing producing fine white sugar thereof |
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| CN102725425A (en) * | 2009-11-11 | 2012-10-10 | 卡博Ua有限公司 | Compositions and methods for improved carbonation clarification of sugar liquors and syrups |
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