CN102815734A - Preparation method of easily-dissolvable aluminum hydroxide - Google Patents
Preparation method of easily-dissolvable aluminum hydroxide Download PDFInfo
- Publication number
- CN102815734A CN102815734A CN2012102621727A CN201210262172A CN102815734A CN 102815734 A CN102815734 A CN 102815734A CN 2012102621727 A CN2012102621727 A CN 2012102621727A CN 201210262172 A CN201210262172 A CN 201210262172A CN 102815734 A CN102815734 A CN 102815734A
- Authority
- CN
- China
- Prior art keywords
- preparation
- prone
- sodium aluminate
- white lake
- aluminate solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title abstract description 9
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 27
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 4
- 239000007790 solid phase Substances 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000009423 ventilation Methods 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 4
- 239000003518 caustics Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000013078 crystal Substances 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 2
- 239000001569 carbon dioxide Substances 0.000 abstract 2
- 238000011112 process operation Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- 239000000047 product Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 9
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000005273 aeration Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 159000000013 aluminium salts Chemical class 0.000 description 3
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 3
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- -1 at present Chemical compound 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a preparation method of easily-dissolvable aluminum hydroxide, and discloses a preparation method of easily-dissolvable aluminum hydroxide for aluminum salt production. The method is characterized by comprising the steps of introducing carbon dioxide gas into sodium aluminate solution served as raw material to perform carbonation decomposition reaction for 1-3 h at decomposition rate of 80-93%; performing liquid-solid separation; and washing separated solid phase with water to obtain aluminum hydroxide product. The low-temperature carbonation decomposition reaction process has no need of crystal seed addition, carbon dioxide gas is introduced into the industrial sodium aluminate solution to perform fast reaction for 1-3 h, and the decomposition rate of 80-93% is achieved. By effective control of reaction process, the prepared aluminum hydroxide with good reaction activity, specific structure and high solubility can react with acid under normal pressure condition to prepare aluminum salt product. The preparation method has the advantages of simple process operation, long equipment service life, low production cost, and low energy consumption.
Description
Technical field
A kind of preparation method who is prone to dissolve white lake relates to a kind of preparation method who produces aluminium salt with white lake.
Background technology
Along with improving constantly to aluminium product salt specification of quality; Its raw materials for production also there is more strict requirement; With the poly aluminium chloride is example; Poly aluminium chloride is that raw material production forms with clay and calcium aluminate mainly at present, and there are problems such as energy consumption is high, equipment amortization is big, the waste residue amount is big, heavy metal content height in this method, is difficult to adapt to the new demand in market.Carry out the solubility in acid evaluation according to following evaluation method: HCl concentration: 12.5%, 95～98 ℃ of temperature, 200min; Hydrochloric acid and white lake equivalent, no matter with Bayer process production still be the white lake of carbon method production be raw material, its acid rate of dissolving is difficult to reach more than 75%; And reaction needs pressurization acid-resistant reacting kettle, very strict to equipment requirements, equipment corrosion is serious, Abschreibungskosten is high; Product cost is high, and in addition, productive capacity is difficult to stablize.Raising along with national drinking water standard; Require more strict to water purification agent poly aluminium chloride foreign matter content; Exploitation is prone to dissolve white lake, improve the product solubility property, not only can satisfy environmental requirement, and help reducing the enterprise production cost; Improve the level of profitability, greatly promote the development of China's aluminium salt production technology.
Patent CN1594095 adopts the quick carbon method of interpolation crystal seed to prepare processable white lake, and carbon divides temperature 80-90 ℃, the product needed oven dry; In addition, product and acid-respons also need pressurize, and temperature of reaction needs more than 140 ℃; Energy consumption is higher, and white lake with the reaction of sour equivalent, the acid of white lake is dissolved rate and is merely about 93%; The residual hydrogen aluminum oxide is more, needs later to handle, and causes cost to increase.
Patent CN1970453 is a kind of preparation method who produces ultrafine aluminium hydroxide, and its key step is with sodium aluminate aqueous solution elder generation and hydrochloric acid reaction, and it is crystal seed that deposition is separated out ultrafine aluminium hydroxide, feeds dioxide gas then, and product gets ultrafine aluminium hydroxide through drying.
Patent CN1250746 is a kind of method of producing pseudo-boehmite and gama-alumina, and this method also is to feed dioxide gas at sodium aluminate solution to become glue, and control reaction end pH value can make pseudo-boehmite and gama-alumina.
Though patent CN1970453 and patent CN1250746 feed dioxide gas in sodium aluminate solution; But ultrafine aluminium hydroxide and the present invention make that to be prone to dissolve the white lake crystalline structure different, and pseudo-boehmite is not with a kind of compound with being prone to dissolve white lake.
Summary of the invention
Problems such as the object of the invention is poor to the white lake solubility in acid that exists in the above-mentioned prior art, energy consumption high, cost is big provide a kind of aluminium salt production requirement of satisfying, ad hoc structure, active good; Under lower temperature conditions, be prone to and acid-respons, can reduce sour consumption, prolong service life of equipment; Reduce environmental pollution, the stably manufactured process helps optimizing the aluminium technology of threonates; Reduce production costs, improve the preparation method who is prone to dissolve white lake of aluminium product salt quality.
The objective of the invention is to realize through following technical scheme.
A kind of preparation method of be prone to dissolving white lake is characterized in that its preparation process is is raw material with the sodium aluminate solution, in sodium aluminate solution, feeds dioxide gas, carries out the carbonating decomposition reaction, and controlling reaction time is 1～3h, and rate of decomposition is 80%～93%; Reaction is carried out liquid-solid separation after finishing, and isolated solid phase is used water washing, makes to be prone to dissolve white lake.
A kind of preparation method who is prone to dissolve white lake of the present invention, the alumina concentration that it is characterized in that said sodium aluminate solution is 70～150g/L, caustic ratio α k1.40～2.00, siliceous modulus 250～900.
A kind of preparation method who is prone to dissolve white lake of the present invention is characterized in that described decomposition temperature of carrying out carbonating decomposition reaction process is 40～80 ℃; The concentration that feeds dioxide gas is 32%～40%.
A kind of preparation method of be prone to dissolving white lake of the present invention, the ventilation speed that it is characterized in that feeding dioxide gas is 6～20gCO
2/ gAl
2O
3Hr.
A kind of preparation method who is prone to dissolve white lake of the present invention is characterized in that described decomposition temperature of carrying out carbonating decomposition reaction process is 50～70 ℃.
A kind of preparation method who is prone to dissolve white lake of the present invention is characterized in that described sodium aluminate solution is an industrial sodium aluminate solution.
Method of the present invention is not added crystal seed in the low temperature carbonation decomposition course, in industrial sodium aluminate solution, feed dioxide gas and carry out rapid reaction, and controlling reaction time is 1～3h, realizes that rate of decomposition is 80%～93%.Owing to effectively control reaction process, but the preparation feedback activity is good, the specific easy white lake that dissolves of structure; The white lake that makes can prepare the aluminium product salt with acid-respons under condition of normal pressure, technological operation is simple, and service life of equipment is long; It is low to have production cost, low power consumption and other advantages.
Embodiment
A kind of preparation method who is prone to dissolve white lake is a raw material with the industrial sodium aluminate solution, and its alumina concentration is 70～150g/L; Caustic ratio α k1.40～2.00; Siliceous modulus 250～900 feeds dioxide gas in industrial sodium aluminate solution, ventilation speed: 6～20gCO
2/ gAl
2O
3Hr carries out quick carbonating decomposition reaction, carries out liquid-solid separation after reaction finishes, and isolated solid phase is used water washing, get final product easy molten white lake product.Reaction process is not added crystal seed; 40～80 ℃ of decomposition temperatures; Optimum temps is 50～70 ℃, gas concentration lwevel: 32%～40%; CO
2Ventilation speed: 6～20gCO
2/ gAl
2O
3Hr; Rate of decomposition 80～93%; Reaction times: 1～3h; Product acid dissolves Shuai>99.0%.When decomposition temperature was higher, reaction was directly carried out filtering separation after finishing; When decomposition temperature was low, reaction finished the first sedimentation in back, separated again, made to be prone to dissolve white lake.
Embodiment 1
With the industrial sodium aluminate solution is raw material, chemical ingredients: Al
2O
3Concentration is 135g/L, and causticity is than α k1.42; Solution siliceous modulus 300,70 ℃ of temperature are not added crystal seed, CO
2Concentration 32%, CO
2Ventilation speed: 8CO
2/ gAl
2O
3Hr, rate of decomposition 93%, aeration time 90min.Decomposed prod after filtering, product is not dried, its acid rate of dissolving is 99.1%.
Embodiment 2
With the industrial sodium aluminate solution is raw material, chemical ingredients: Al
2O
3Concentration is 110g/L, and causticity is than α k1.60; Solution siliceous modulus 550,60 ℃ of temperature are not added crystal seed, CO
2Concentration 34%, CO
2Ventilation speed: 13CO
2/ gAl
2O
3Hr, rate of decomposition 91%, aeration time 95min.Decomposed prod after filtering, product is not dried, its acid rate of dissolving is 99.3%.
Embodiment 3
With the industrial sodium aluminate solution is raw material, chemical ingredients: Al
2O
3Concentration is 90g/L, and causticity is 1.75 than α k; Solution siliceous modulus 750,65 ℃ of temperature are not added crystal seed, CO
2Concentration 36%, CO
2Ventilation speed: 16CO
2/ gAl
2O
3Hr, rate of decomposition 90%, aeration time 88min.Decomposed prod after filtering, product is not dried, its acid rate of dissolving is 99.5%.
Embodiment 4
With the industrial sodium aluminate solution is raw material, chemical ingredients: Al
2O
3Concentration is 75 g/L, and causticity is 1.90 than α k; Solution siliceous modulus 850,50 ℃ of temperature are not added crystal seed, CO
2Concentration 38%, CO
2Ventilation speed: 20CO
2/ gAl
2O
3Hr, rate of decomposition 88%, aeration time 95min.Decomposed prod after filtering, product is not dried, its acid rate of dissolving is 99.7%.
Claims (6)
1. preparation method of be prone to dissolving white lake is characterized in that its preparation process is is raw material with the sodium aluminate solution, in sodium aluminate solution, feeds dioxide gas, carries out the carbonating decomposition reaction, and controlling reaction time is 1～3h, and rate of decomposition is 80%～93%; Reaction is carried out liquid-solid separation after finishing, and isolated solid phase is used water washing, makes to be prone to dissolve white lake.
2. a kind of preparation method who is prone to dissolve white lake according to claim 1, the alumina concentration that it is characterized in that said industrial sodium aluminate solution is 70～150g/L, caustic ratio α k1.40～2.00, siliceous modulus 250～900.
3. a kind of preparation method who is prone to dissolve white lake according to claim 1 is characterized in that described decomposition temperature of carrying out carbonating decomposition reaction process is 40～80 ℃; The concentration that feeds dioxide gas is 32%～40%.
4. a kind of preparation method of be prone to dissolving white lake according to claim 1, the ventilation speed that it is characterized in that feeding dioxide gas is 6～20gCO
2/ gAl
2O
3Hr.
5. a kind of preparation method who is prone to dissolve white lake according to claim 1 is characterized in that described decomposition temperature of carrying out carbonating decomposition reaction process is 50～70 ℃.
6. a kind of preparation method who is prone to dissolve white lake according to claim 1 is characterized in that described sodium aluminate solution is an industrial sodium aluminate solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102621727A CN102815734A (en) | 2012-07-27 | 2012-07-27 | Preparation method of easily-dissolvable aluminum hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102621727A CN102815734A (en) | 2012-07-27 | 2012-07-27 | Preparation method of easily-dissolvable aluminum hydroxide |
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| Publication Number | Publication Date |
|---|---|
| CN102815734A true CN102815734A (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102621727A Pending CN102815734A (en) | 2012-07-27 | 2012-07-27 | Preparation method of easily-dissolvable aluminum hydroxide |
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130382A (en) * | 2021-12-14 | 2022-03-04 | 河南能源化工集团研究总院有限公司 | Aluminum hydroxide powder and preparation method thereof |
| CN114735734A (en) * | 2022-03-22 | 2022-07-12 | 中铝中州铝业有限公司 | Method for preparing soluble aluminum hydroxide by Bayer process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289721A (en) * | 2000-11-09 | 2001-04-04 | 中国长城铝业中州铝厂 | Method for producing aluminum hydroxide |
| CN1289722A (en) * | 2000-11-09 | 2001-04-04 | 中国长城铝业中州铝厂 | Method for producing beta-type aluminium hydroxide |
| EP1259463B1 (en) * | 2000-02-29 | 2003-10-29 | Hydro Aluminium Deutschland GmbH | Method of making aluminium hydroxide gel |
| CN1594095A (en) * | 2004-06-18 | 2005-03-16 | 中国铝业股份有限公司 | Process for producing soluble aluminum hydroxide |
-
2012
- 2012-07-27 CN CN2012102621727A patent/CN102815734A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1259463B1 (en) * | 2000-02-29 | 2003-10-29 | Hydro Aluminium Deutschland GmbH | Method of making aluminium hydroxide gel |
| CN1289721A (en) * | 2000-11-09 | 2001-04-04 | 中国长城铝业中州铝厂 | Method for producing aluminum hydroxide |
| CN1289722A (en) * | 2000-11-09 | 2001-04-04 | 中国长城铝业中州铝厂 | Method for producing beta-type aluminium hydroxide |
| CN1594095A (en) * | 2004-06-18 | 2005-03-16 | 中国铝业股份有限公司 | Process for producing soluble aluminum hydroxide |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130382A (en) * | 2021-12-14 | 2022-03-04 | 河南能源化工集团研究总院有限公司 | Aluminum hydroxide powder and preparation method thereof |
| CN114130382B (en) * | 2021-12-14 | 2023-11-21 | 河南能源化工集团研究总院有限公司 | Aluminum hydroxide powder and preparation method thereof |
| CN114735734A (en) * | 2022-03-22 | 2022-07-12 | 中铝中州铝业有限公司 | Method for preparing soluble aluminum hydroxide by Bayer process |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121212 |