CN1076914A - The production technique of bodied ferric sulfate and device - Google Patents
The production technique of bodied ferric sulfate and device Download PDFInfo
- Publication number
- CN1076914A CN1076914A CN 92106689 CN92106689A CN1076914A CN 1076914 A CN1076914 A CN 1076914A CN 92106689 CN92106689 CN 92106689 CN 92106689 A CN92106689 A CN 92106689A CN 1076914 A CN1076914 A CN 1076914A
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- ferric sulfate
- reaction
- bodied ferric
- production
- production technique
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 title claims abstract description 25
- 229910000360 iron(III) sulfate Inorganic materials 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 40
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 35
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 27
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 24
- 239000011790 ferrous sulphate Substances 0.000 claims description 23
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 239000002699 waste material Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000011541 reaction mixture Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 4
- 230000035484 reaction time Effects 0.000 abstract description 4
- 239000008399 tap water Substances 0.000 abstract description 3
- 235000020679 tap water Nutrition 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 8
- 239000002994 raw material Substances 0.000 description 6
- 230000009972 noncorrosive effect Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 4
- 235000010288 sodium nitrite Nutrition 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- OMBRFUXPXNIUCZ-UHFFFAOYSA-N dioxidonitrogen(1+) Chemical compound O=[N+]=O OMBRFUXPXNIUCZ-UHFFFAOYSA-N 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 229920000592 inorganic polymer Polymers 0.000 description 2
- 239000006210 lotion Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a kind of production technique and device of bodied ferric sulfate, solved the long reaction time that exists in the existing production technology, efficient is low, and reaction time is long, has problems such as pollution.The present invention adopts nitric acid to make catalyzer, uses the pure oxygen oxidation, under heating, utilizes reaction tower to react, and reaction efficiency obviously improves.Catalyzer can be recycled simultaneously, does not need exhaust gas absorption equipment.It is simple that the present invention has reached production unit, and less investment is with short production cycle, the output height, and cost is low, free of contamination purpose.Product is suitable for the processing of process water, tap water and various sewage.
Description
The invention belongs to technical field of chemical engineering, relate to a kind of production technique and device of novel inorganic polymer water conditioner, more precisely the production technique of bodied ferric sulfate and device.
Bodied ferric sulfate is a kind of novel inorganic polymer water conditioner that external the seventies grows up, aspect water treatment, for chemical oxygen demand, biochemical oxygen demand, suspended solid, colourity, stench etc. significant removal effect is arranged, can be widely used for process water, tap water and sewage disposal, be a kind of cheapness, good water conditioner.It is raw material that the clear 51-17516 of Japan has proposed the employing ferrous sulfate, and Sodium Nitrite is a catalyzer, carries out 17 hours atmospheric oxidation, produces the method for liquid polymeric ferric sulfate.This method catalyst amounts is big, and oxidation rate is slow, and the production cycle is long, and constantly discharges the gas that contains a large amount of nitrogen peroxide in oxidising process, pollutes, and need handle, thereby make the equipment complexity, and investment increases.
Chinese patent CN86100483A improves the technology of the preparation bodied ferric sulfate of the clear 51-17516 of Japan.This technology is that to wash waste liquid with sulfuric acid be raw material, and the mol ratio of sulfuric acid and ferrous sulfate is 0.31～0.50, still is catalyzer with the Sodium Nitrite, feed pure oxygen and carry out oxidation, and at 55 ℃～90 ℃, 1.5～3.0kg/cm
2Carry out oxidative polymerization under violent stirring (rotating speed: the 1000 rev/mins) condition, the consumption of Sodium Nitrite is 0.4～1% of a solution weight, this method is compared with the production technique that Japanese Patent is proposed, have the industrial sulphuric acid of utilization and wash waste liquid, the shortening of oxypolymerization time, improved characteristics such as production efficiency, the minimizing of catalyst consumption amount.But owing to still adopted Sodium Nitrite is that catalyzer causes and contains a spot of sodium sulfate in the product, and this salt pair water treatment is inoperative; And the back unnecessary nitrogen peroxide of production end etc. still need to enter atmosphere, pollute.This method adopts intensive mechanical stirring (1000 rev/mins of rotating speeds), at 1.5～3.0kg/cm
2Pressure is reaction down, and this had both required withstand voltage for chemical industry equipment, requires corrosion-resistantly again, must carry out high-speed stirring simultaneously, carries out relatively difficulty of scale operation, and operation is also inconvenient in addition.
Purpose of the present invention is exactly technology and the production equipment that is to work out a kind of new production bodied ferric sulfate, has overcome some shortcomings of above-mentioned patent, produces not contain Na
2SO
4In the simple polymerisation ferric sulfate of material, shortened the production cycle, improved production efficiency, be suitable for large-scale industrial production.
The method of production bodied ferric sulfate proposed by the invention is with waste iron filing and ferrous sulfate (FeSO
47H
2O) or the iron and steel sulfuric acid lotion be iron-bearing material, produce bodied ferric sulfate with waste iron filing, at first, produce copperas solution with waste iron filing and sulfuric acid reaction, reaction equation is as follows:
Contain impurity such as a small amount of insoluble ferric oxide, carbon black in this copperas solution, must filter, just can obtain purified copperas solution through sedimentation.If directly utilize iron and steel sulfuric acid pickling waste liquid or ferrous sulfate, the ratio that can adjust ferrous sulfate, sulfuric acid and water is 55～65%: 5～10%: in 25～40% the scope, directly carry out oxidative polymerization and prepare bodied ferric sulfate (Fe under the nitric acid katalysis
2(OH) n(SO
4)
3-n/2)
mReaction equation is as follows:
The total reaction equation is:
In the formula: m=f(n)
Above-mentioned three kinds of iron-bearing materials are produced most convenient to adopt industrial ferrous sulfate.Industrial ferrous sulfate mainly is a byproduct of producing titanium dioxide, ferrous sulfate content height, and heavy metal ion content is few, and price comparison is low.The amount of used nitric acid is 1～4% of ferrous sulfate, sulfuric acid and a water gross weight in the reaction process.
Under the nitric acid katalysis, the reaction of dioxygen oxidation ferrous sulfate is a gas-liquid two-phase reaction, and in order to quicken the process of liquid-absorbent gas, it is conversion unit that the present invention adopts the filler reaction tower, the huge specific surface area of utilizing liquid flow to produce when the filler reaction tower is strengthened NO
2Deng the absorption of gas, thereby promoted the carrying out that reacts.
The present invention realizes like this, with ferrous sulfate, the vitriol oil and water are in 55～60%: 5～10%: 25～40% ratio is added in the dissolving heating tank (utilizes the copperas solution or the iron and steel sulfuric acid pickling waste liquid of iron filings preparation identical for the production technique of raw material, just to adjust ferrous sulfate, the ratio of sulfuric acid and water is in above-mentioned scope), utilize water vapour to be heated to 40～100 ℃ by chuck, with noncorrosive pump reaction solution is extracted out by dissolving in the heating tank then, squeeze into the reaction tower top, liquid by overhead streams through filler, return the dissolving heating tank by tower bottom flow again, circulation so continuously, in working cycle, respectively by adding nitric acid and oxygen at the bottom of cat head and the tower.Pressure in the reaction process in the tower can be controlled at-0.02～+ the 0.02MPa scope in, temperature is 40～100 ℃, constantly sampling in the reaction process, analyze the content of ferrous sulfate, after treating the ferrous sulfate complete oxidation, stop logical oxygen, add catalyzer nitric acid, and the circulation of liquid, liquid polymeric ferric sulfate is squeezed into the finished product pond with noncorrosive pump.Reaction finishes to still have a large amount of oxygen, nitrogen protoxide, nitrogen peroxide etc. in the tower of back, can wait until to produce next time and use, and considers the long-distance transport of bodied ferric sulfate, can utilize spray-drying tower that liquid polymeric ferric sulfate is made the powdery solid bodied ferric sulfate.
Accompanying drawing 1 is the process flow diagram of raw material production bodied ferric sulfate with iron filings.
Accompanying drawing 2 is the process flow diagram of raw material production bodied ferric sulfate with the ferrous sulfate.
Accompanying drawing 3 is the process flow diagram of feedstock production bodied ferric sulfate with the iron and steel sulfuric acid pickling waste liquid.
Accompanying drawing 4 is produced the process flow diagram of solid ferric polysulfate.
Accompanying drawing 5 is produced the process flow sheet of bodied ferric sulfate.
The accompanying drawing mark:
1, tensimeter 2, oxygen decompression table 3, oxygen cylinder 4, nitric acid test tank 5, nitric acid under meter 6, reaction tower 7, electric mixer 8, enamel reaction still 9, finished product pond 10, noncorrosive pump 11, thief hole 12, dissolving heating tank 13, charging opening 14, vacuum filter 15, settling bowl
Technique of the present invention and device have following characteristics:
1, the technique that adopts the present invention to propose is carried out the oxidative polymerization required time and is 25～40 minutes, and is with short production cycle, and production efficiency is high.
2, to adopt nitric acid be catalyst in the present invention, sodium sulphate can not introduced the polyaluminum sulfate iron product, thereby product quality is improved.
3, the nitrogen oxide that produces in redox reaction of catalyst nitric acid can be reused, and has improved the utilization rate of raw material, has avoided simultaneously the pollution to atmosphere.
4, technique of the present invention and device take reaction tower as consersion unit, do not need any mechanical agitation, carry out oxidation by liquid mobile, improve reaction efficiency, have shortened the production cycle.
5, technique of the present invention and device are to produce in the very low situation of gauge pressure, and be safe, easy to operate.
6, technique of the present invention and device have characteristics reasonable in design, constant product quality.
Embodiment 1
Get waste iron filing 0.5kg, concentration and be 30% sulfuric acid 4.46kg and put into reactor (7), utilize chuck cooling water control temperature of reaction to be no more than 90 ℃, afterreaction finished in 1 hour, reaction product is moved in the settling bowl (15), remove the macrobead insoluble impurities through sedimentation, then product liquid is filtered through vacuum filter (14), further remove insoluble impurities, get filtrate 4.7kg.Sulfur acid is ferrous 46% in the filtrate by analysis, sulfuric acid 8.6%.By charging opening (13) filtrate is added in the dissolving heating tank (12), add ferrous sulfate 2.1kg again, close opening for feed (13).With said mixture heat temperature raising to 85 ℃, with noncorrosive pump (10) with liquid continuously from dissolving heating tank (12) extraction squeeze into reaction tower (6) top, liquid flows back to dissolving heating tank (12) by tower bottom, and the flow of regulating pump makes liquid be in recurrent state.In working cycle, add nitric acid by nitric acid test tank (4) and nitric acid under meter (5), pass through oxygen cylinder (3) and oxygen decompression table (2) aerating oxygen in tower by the tower Lower Half simultaneously from the tower first half.The control oxygen-supply quantity, adjust pressure in the reaction tower-0.02～+ the 0.02MPa scope in.Temperature is 85 ℃ in the tower, in the reaction process constantly from the content of thief hole (11) sampling analysis ferrous sulfate, after 40 minutes, the ferrous sulfate complete oxidation, stop logical nitrogen, add the circulation of nitric acid and liquid, the liquid product bodied ferric sulfate is squeezed in the finished product pond (9) with noncorrosive pump (10) by dissolving heating tank (12).Consumption concentration is 60% nitric acid 230ml in the reaction process.Product index is as follows by analysis:
Fe
3+Content is 165g/l, Fe
2+Content is zero, and basicity is that 13.5% density is 1.485g/cm
3(20 ℃).
Get ferrous sulfate 3.6kg, tap water 1.8kg, density is 1.84g/cm
3Sulfuric acid 220ml, directly add in the dissolving heating tank (12), close charging opening (13), heat temperature raising to 80 ℃.Subsequent step is with embodiment 1.Reaction times is 30 minutes, and the nitric acid consumption is 102ml.Product index is as follows: Fe
3+Content is 161g/L, Fe
2+Content is zero, and basicity is 12.1%, and density is: 1.475g/cm
3(20 ℃).
Get and contain Fe
2+110g/L, H
2SO
4The iron and steel sulfuric acid lotion 3.5L of 115g/L joins in the dissolving heating tank (12), adds ferrous sulfate 1.85kg again, closes charging opening (13), is heated to 70 ℃.Subsequent step is with embodiment 1, and in 25 minutes reaction times, the nitric acid consumption is 125ml.Product index is as follows: Fe
3+Content is 170g/L, Fe
2+Content is zero, and basicity is 11.3%, and density is 1.496g/cm
3(20 ℃)
Claims (4)
1, a kind of production technique of bodied ferric sulfate and device are with iron filings, ferrous sulfate (FeSO
47H
2O) or iron and steel sulfuric acid to wash waste liquid be iron-bearing material, the ratio of adjusting ferrous sulfate, sulfuric acid and water is 55～65%: 5～10%: 25～40% carry out oxidative polymerization in 40～100 ℃, it is characterized in that with nitric acid being catalyzer, in reaction tower, feed pure oxygen, reacting near under the condition of normal pressure.
2, the production technique of bodied ferric sulfate according to claim 1 and device is characterized in that employed catalyzer nitric acid is 1～4% of ferrous sulfate, sulfuric acid and water gross weight.
3, the production technique of bodied ferric sulfate according to claim 1 and device is characterized in that with reaction tower be main production equipments, utilize reaction mixture flow process in tower to carry out oxidative polymerization.
4, according to the production technique and the device of the described production bodied ferric sulfate of claim 1, it is characterized in that reaction pressure be-0.02～+ 0.02MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106689 CN1076914A (en) | 1992-08-31 | 1992-08-31 | The production technique of bodied ferric sulfate and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106689 CN1076914A (en) | 1992-08-31 | 1992-08-31 | The production technique of bodied ferric sulfate and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1076914A true CN1076914A (en) | 1993-10-06 |
Family
ID=4942338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106689 Pending CN1076914A (en) | 1992-08-31 | 1992-08-31 | The production technique of bodied ferric sulfate and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1076914A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037762C (en) * | 1994-11-04 | 1998-03-18 | 华南理工大学 | Process for producing compound poly-ferric aluminium sulfate |
| CN100347099C (en) * | 2003-11-06 | 2007-11-07 | 同济大学 | One-step production method for coagulant solid polymerized silica ferric sulfate |
| JP2014070011A (en) * | 2012-10-02 | 2014-04-21 | Miyama Kk | Production method of polyferric sulfate solution |
| CN104291384A (en) * | 2014-09-28 | 2015-01-21 | 攀枝花钢城集团瑞天安全环保有限公司 | Method for producing polymeric ferric sulfate |
| CN111137925A (en) * | 2020-01-06 | 2020-05-12 | 湖南省环境保护科学研究院 | Method for preparing water purifying agent by using industrial waste sulfuric acid and waste cutter head |
| CN111672276A (en) * | 2020-06-01 | 2020-09-18 | 深圳市长隆科技有限公司 | Resource utilization process of waste gas in production process of polymeric ferric sulfate |
| CN113461017A (en) * | 2021-07-09 | 2021-10-01 | 斯瑞尔环境科技股份有限公司 | Resource utilization method for fluorine-containing waste acid applied to photovoltaic industry |
| CN115135607A (en) * | 2020-03-19 | 2022-09-30 | 日铁矿业株式会社 | High-concentration iron-based flocculant and production method thereof |
-
1992
- 1992-08-31 CN CN 92106689 patent/CN1076914A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037762C (en) * | 1994-11-04 | 1998-03-18 | 华南理工大学 | Process for producing compound poly-ferric aluminium sulfate |
| CN100347099C (en) * | 2003-11-06 | 2007-11-07 | 同济大学 | One-step production method for coagulant solid polymerized silica ferric sulfate |
| JP2014070011A (en) * | 2012-10-02 | 2014-04-21 | Miyama Kk | Production method of polyferric sulfate solution |
| CN104291384A (en) * | 2014-09-28 | 2015-01-21 | 攀枝花钢城集团瑞天安全环保有限公司 | Method for producing polymeric ferric sulfate |
| CN111137925A (en) * | 2020-01-06 | 2020-05-12 | 湖南省环境保护科学研究院 | Method for preparing water purifying agent by using industrial waste sulfuric acid and waste cutter head |
| CN115135607A (en) * | 2020-03-19 | 2022-09-30 | 日铁矿业株式会社 | High-concentration iron-based flocculant and production method thereof |
| CN115135607B (en) * | 2020-03-19 | 2024-04-05 | 日铁矿业株式会社 | High-concentration iron flocculant and production method thereof |
| TWI887377B (en) * | 2020-03-19 | 2025-06-21 | 日商日鐵鑛業股份有限公司 | High-concentration iron-based flocculant and method for manufacturing the same |
| CN111672276A (en) * | 2020-06-01 | 2020-09-18 | 深圳市长隆科技有限公司 | Resource utilization process of waste gas in production process of polymeric ferric sulfate |
| CN113461017A (en) * | 2021-07-09 | 2021-10-01 | 斯瑞尔环境科技股份有限公司 | Resource utilization method for fluorine-containing waste acid applied to photovoltaic industry |
| CN113461017B (en) * | 2021-07-09 | 2023-03-10 | 斯瑞尔环境科技股份有限公司 | Resource utilization method for fluorine-containing waste acid applied to photovoltaic industry |
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