CN101486446B - Method for coproduction of bleaching powder, active carbon, sodium chloride and sulphuric acid from waste gypsum plaster - Google Patents
Method for coproduction of bleaching powder, active carbon, sodium chloride and sulphuric acid from waste gypsum plaster Download PDFInfo
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- CN101486446B CN101486446B CN2009100365809A CN200910036580A CN101486446B CN 101486446 B CN101486446 B CN 101486446B CN 2009100365809 A CN2009100365809 A CN 2009100365809A CN 200910036580 A CN200910036580 A CN 200910036580A CN 101486446 B CN101486446 B CN 101486446B
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- CN
- China
- Prior art keywords
- waste
- bleaching powder
- calcium
- sodium chloride
- sulphuric acid
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- Expired - Fee Related
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 31
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 30
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 28
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000007844 bleaching agent Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 14
- 239000001117 sulphuric acid Substances 0.000 title claims abstract description 9
- 235000011149 sulphuric acid Nutrition 0.000 title claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 title claims description 3
- 239000011507 gypsum plaster Substances 0.000 title 1
- 239000010440 gypsum Substances 0.000 claims abstract description 29
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- 239000012065 filter cake Substances 0.000 claims abstract description 18
- 238000005660 chlorination reaction Methods 0.000 claims abstract description 17
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 16
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000000706 filtrate Substances 0.000 claims abstract description 14
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 14
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 13
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 13
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 12
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 12
- 239000000047 product Substances 0.000 claims abstract description 12
- 239000001110 calcium chloride Substances 0.000 claims abstract description 10
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000004821 distillation Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 4
- 239000013078 crystal Substances 0.000 claims abstract description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 14
- 239000000460 chlorine Substances 0.000 claims description 10
- 229910052801 chlorine Inorganic materials 0.000 claims description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 235000011132 calcium sulphate Nutrition 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000012043 crude product Substances 0.000 claims description 4
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 208000004434 Calcinosis Diseases 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000005649 metathesis reaction Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010926 purge Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract description 10
- 239000011259 mixed solution Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011505 plaster Substances 0.000 abstract 3
- 239000002912 waste gas Substances 0.000 abstract 2
- 239000002351 wastewater Substances 0.000 abstract 2
- 235000008504 concentrate Nutrition 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 235000014483 powder concentrate Nutrition 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 8
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a method for producing bleaching powder concentrate and activated carbon co-production sodium chloride and sulphuric acid by using waste gypsum mud. The method comprises the following specific steps: after being pretreated, the waste gypsum mud reacts with hydrochloric acid, a mixed solution of calcium chloride and sulphuric acid and a filter cake are obtained by filtration; the filtrate reacts with sodium sulfate to generate pure white plaster deposit and sodium chloride; a sodium chloride solution and a pure plaster filter cake are obtained by filtration; sodium chloride crystal and a sulphuric acid solution are obtained by the slight distillation of the filtrate, and the sulphuric acid solution can be made into concentrated sulfuric acid products by slight concentration; the plaster filter cake continues to react with sodium hydroxide to generate pure calcium hydroxide and a sodium sulfate solution, the sodium sulfate solution can be reused and the bleachingpowder concentrate is obtained by the chlorination, separation, drying and crushing of the pure calcium hydroxide. The method effectively and reasonably utilizes chemical reaction principle to treat waste gas, waste water and waste residues and changes waste into valuables, thus not only saving the cost of treating waste acid, but also creating remarkable economic value. The method can be considered to be canonical in the comprehensive utilization of waste gas, waste water and waste residues, deeply embodies the advantage of circular economy, and simultaneously, greatly improves the deep processing capability of enterprises.
Description
Technical field:
The present invention relates to the technical field of three industrial wastes comprehensive utilization, particularly waste gypsum mud and make high test bleaching powder and gac co-producing sodium chloride and vitriolic method.
Technical background:
At present, the sulfur waste acid treatment method of sulfuric acid process Qin Baifenchang is various, is but more to utilize the improvement that neutralizes of carbide slag and limestone powder.Pile up like a mountain soon for so a large amount of waste gypsum muds.Present accumulating amount has allowed enterprise bear, and buries in can only face the mountain outward ditch or the heatable adobe sleeping platform.Going down so is not a way after all, does not say that except polluting also will occupy a large amount of land areas, it is unfavorable to the people so neither to benefit the nation yet.
Enterprise gives the cement mill gypsum mud in the hope of being turned waste into wealth, and still, because the impurity level of gypsum mud is too high, so that influenced the quality product in cement mill, unique hope has been broken again.Gypsum mud is handled in the present invention and utilization has reached very ideal boundary, has not only removed the pollution of waste gypsum mud completely, and, also turn waste into wealth and create very considerable economic value.Also inter-tradely dock successfully, produce the Chemicals that economic worth is arranged very much, also utilize simultaneously and gone up the self-produced product of chlor-alkali plant with the basic material of chlorine industry.Be the model and the model of multipurpose use of three types of wastes technology.
Summary of the invention:
The purpose of this invention is to provide a kind of formed waste gypsum mud of carbide slag neutralizing treatment sulfur waste acid, again with the form a complete production network technical scheme of high test bleaching powder and sodium sulfate and chlorine-bearing compound of chlor-alkali industry with the white powder station-service polyvinyl chloride factory of admiring.When effectively having overcome, eliminated secondary pollution basically and reached zero release, also solved the problem of taking up an area of because of accumulation because of a large amount of expense of handling that waste gypsum mud takes place.Improve economic benefit greatly for enterprise by the recycle of waste material, and first admire white powder industry and polyvinyl chloride industry and chlorine industry are made series chemical product by the waste material utilization.
For reaching above-mentioned purpose, therefore technical scheme of the present invention is:
A kind of waste gypsum mud is made high test bleaching powder and gac co-producing sodium chloride and vitriolic method, be to generate by the reaction of the waste gypsum mud behind chlorine and the purifying, the purified calcium hydroxide that gypsum mud obtains through purifying, and, co-producing active carbon product when generating high test bleaching powder;
Described waste gypsum mud purge process comprises natural subsidence, purifies and purification, and acidifying and metathesis, its concrete processing step is:
Waste gypsum mud and water are by weight 1: 4-8 injects the stirring of pretreater (1) lining becomes uniform emulsion, and natural subsidence is removed the pure emulsion of gypsum that impurity obtains suspending; Pure emulsion of gypsum and hydrochloric acid inject cleaner (2) by pure mass ratio 1: 0.2-0.6, stir to make material reach complete reaction, with getting calcium chloride and sulfuric acid mixture liquid and filter cake behind first whizzer (3) suction filtration; Filter cake makes gac through absorbent charcoal fine purification device (4), second whizzer (5); Filtrate and sodium sulfate are pressed mass ratio 1: 1-1.4 and are injected secondary reacting kettle (6) lining and stir and generate bright sulfur acid calcium deposit and sodium chloride solution, with the 3rd whizzer (7) suction filtration get filter cake calcium sulfate with clear water wash three times after filtration white purified two H 2 O calcium sulphates; Filtrate gets purified sodium chloride crystal and sulphuric acid soln through distillation tower (8), condenser (9) crystallisation by cooling, and sulphuric acid soln just obtains the concentrated sulfuric acid solution of 75-85% again through underpressure distillation; Calcium sulfate and sodium hydroxide react on the metabisulfite solution that generates purified calcium hydroxide in the main reaction still (10) and can return recycle by mass ratio 1: 0.2-0.7;
Its chemical principle is as follows:
The first step: CaSO
4+ 2HCl → CaCl
2+ H
2SO
4
Second step: [CaCl
2+ H
2SO
4]+Na
2SO
4→ CaSO
4+ 2NaCl+H
2SO
4
Refining gac: [CaSO
4+ C]+2HCl → CaCl
2+ H
2SO
4+ C
The above-mentioned calcium sulfate that obtains injects main reaction still (10) with the good sodium hydroxide of dilution together by mass ratio 1: 0.2-0.7, mixes to such an extent that calcium hydroxide precipitation and metabisulfite solution can return and recycle; After the 4th whizzer (11) is centrifugal, gained calcium hydroxide washs three furnishing emulsions with clear water, enter chlorination tower (12) with chlorine by mass ratio 1: 0.4-1.1 again, chlorination process is as the criterion with the reading of chlorination table (13), going up when table that reading stops when constant is exactly the chlorination terminal point, high test bleaching powder precipitation and calcium chloride solution have been obtained at last, filter through the 5th whizzer (14) and to obtain the high test bleaching powder crude product and calcium chloride solution can return recycle, the high test bleaching powder crude product is drying again, enters that (15) crushing packing becomes the high test bleaching powder product between product.Its chemical principle is as follows:
The 3rd step: CaSO
4+ 2NaOH → Ca (OH)
2+ Na
2SO
4
The 4th step: 8Ca (OH)
2+ 6Cl
2→ 3Ca (C10)
22Ca (OH)
2H
2O+3CaCl
2+ 4H
2O
Electrolytic industry salt solution principle:
Calcium carbide route vinylchlorid forms principle: CaC+H
2O → C
2H
2+ Ca (OH)
2(carbide slag)
C
2H
2+HCl→CH
2＝＝＝CHCl
Description of drawings:
This figure is a process flow sheet of the present invention, is made up of following equipment:
The 1----pretreater, 2----cleaner, 4----activated carbon treater, 6----secondary reacting kettle, the 8----distillation tower, 9----condenser, 10----main reaction still, 12----chlorination tower, 13----chlorination table, between the 15----product, 16----pulverizer, 357 11 14----whizzers.
Specific embodiment:
Embodiment 1: the waste gypsum mud of Qin Baifenchang is got 400kg and service water injected in the pretreater 1 by weight 1: 6, stirring becomes the emulsion natural subsidence and removes bottom impurity and take out more purified gypsum emulsion.Complete reaction gets calcium chloride and sulfuric acid mixed solution after then carrying out stirring reaction with hydrochloric acid by 2 li of mass ratio injection in 1: 0.4 cleaners, and is centrifugal that filter cake can be made with extra care gac 24kg, obtains filtrate calcium chloride 192.62kg and sulfuric acid 171.82kg respectively; Filtrate and sodium sulfate are mixed in the reaction of 6 li of secondary reacting kettles by mass ratio and generate purified calcium sulfate 223.68kg and sodium-chlor 192.42kg at 1: 1.2, after centrifugal filtrate through the distillatory sodium chloride crystal and the vitriol oil; Remaining filter cake continues and sodium hydroxide press mass ratio 1: 0.8 and precipitated 165.52kg and sodium sulfate 317.62kg at 10 li purified calcium hydroxides of reaction generation of main reaction still, through the centrifugal metabisulfite solution; And filter cake calcium hydroxide and chlorine are pressed mass ratio 1: 0.8 and are being generated high test bleaching powder 190.54kg and the calcium chloride 103.48kg calcium chloride solution after centrifugal after 12 li chlorinations of chlorination tower, and high test bleaching powder enters after drying that 15 crushing packings both had been standard prod between product again.
Embodiment 2: get waste gypsum mud 400kg and water and injected in the pretreater by 1: 4 and stir into uniform emulsion, the more purified emulsion that obtains after static and hydrochloric acid are by the mixed solution that injects cleaner generation calcium chloride 97.32kg and sulfuric acid 85.92kg at 1: 0.2. and filtering filter cake can be gac 24kg; Filtrate and sodium sulfate reacted by 1: 1 and obtain sulfate precipitate calcium 119.24kg and sodium-chlor 102.58kg, filter to get filtrate through distill sodium-chlor and sulfuric acid; Filter cake and sodium hydroxide by react at 1: 0.2 calcium hydroxide 22.06kg and sodium sulfate 42.32kg, sodium sulfate after filtration; Filter cake and chlorine were sent into the chlorination of chlorination tower respectively by 1: 0.4 and are got high test bleaching powder 12.7kg and calcium chloride 6.9kg, separate calcium chloride solution, the high test bleaching powder drying is pulverized, packing becomes standard prod.
Embodiment 3: get waste gypsum mud 400kg and water and stirred into uniform emulsion by 1: 8 in the injection pretreater, more purified emulsion that obtains after static and hydrochloric acid injected the mixed solution that cleaner generates calcium chloride 261.18kg and sulfuric acid 230.58kg by 1: 0.6, and filtering filter cake can be gac 24kg; Filtrate and sodium sulfate reacted by 1: 1.4 and obtain sulfate precipitate calcium 320kg and sodium-chlor 275.3kg, filter to get filtrate through distill sodium-chlor and sulfuric acid: filter cake and sodium hydroxide by react at 1: 0.7 calcium hydroxide 175.2kg and sodium sulfate 334.4kg, sodium sulfate after filtration; Filter cake and chlorine were sent into the chlorination of chlorination tower respectively by 1: 1.1 and are got high test bleaching powder 180.28kg and calcium chloride 97.94kg, separate calcium chloride solution, the high test bleaching powder drying is pulverized, packing becomes standard prod.
Claims (1)
1. a waste gypsum mud is made high test bleaching powder and gac co-producing sodium chloride and vitriolic method, be to generate by the reaction of the waste gypsum mud behind chlorine and the purifying, it is characterized in that the purified calcium hydroxide that gypsum mud obtains through purifying, and, co-producing active carbon product when generating high test bleaching powder;
Described waste gypsum mud purge process comprises natural subsidence, purifies and purification, and acidifying and metathesis, its concrete processing step is:
Waste gypsum mud and water are by weight 1: 4-8 injects the stirring of pretreater (1) lining becomes uniform emulsion, and natural subsidence is removed the pure emulsion of gypsum that impurity obtains suspending; Pure emulsion of gypsum and hydrochloric acid inject cleaner (2) by pure mass ratio 1: 0.2-0.6, stir to make material reach complete reaction, with getting calcium chloride and sulfuric acid mixture liquid and filter cake behind first whizzer (3) suction filtration; Filter cake makes gac through absorbent charcoal fine purification device (4), second whizzer (5); Filtrate and sodium sulfate are pressed mass ratio 1: 1-1.4 and are injected secondary reacting kettle (6) lining and stir and generate bright sulfur acid calcium deposit and sodium chloride solution, with the 3rd whizzer (7) suction filtration get filter cake calcium sulfate with clear water wash three times after filtration white purified two H 2 O calcium sulphates; Filtrate gets purified sodium chloride crystal and sulphuric acid soln through distillation tower (8), condenser (9) crystallisation by cooling, and sulphuric acid soln just obtains the concentrated sulfuric acid solution of 75-85% again through underpressure distillation; Calcium sulfate and sodium hydroxide react on the metabisulfite solution that generates purified calcium hydroxide in the main reaction still (10) and return recycle by mass ratio 1: 0.2-0.7; After the 4th whizzer (11) is centrifugal, gained calcium hydroxide washs three furnishing emulsions with clear water, enter chlorination tower (12) with chlorine by mass ratio 1: 0.4-1.1 again, chlorination process is as the criterion with the reading of chlorination table (13), and going up when table that reading stops when constant is exactly the chlorination terminal point; Obtained the high test bleaching powder precipitation at last and returned the calcium chloride solution of recycle, filtered to get filtrate and the high test bleaching powder crude product through the 5th whizzer (14), the high test bleaching powder crude product is drying again, enters (15) between product, become the high test bleaching powder product with pulverizer (16) crushing packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100365809A CN101486446B (en) | 2009-01-12 | 2009-01-12 | Method for coproduction of bleaching powder, active carbon, sodium chloride and sulphuric acid from waste gypsum plaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100365809A CN101486446B (en) | 2009-01-12 | 2009-01-12 | Method for coproduction of bleaching powder, active carbon, sodium chloride and sulphuric acid from waste gypsum plaster |
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| Publication Number | Publication Date |
|---|---|
| CN101486446A CN101486446A (en) | 2009-07-22 |
| CN101486446B true CN101486446B (en) | 2011-02-09 |
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|---|---|---|---|
| CN2009100365809A Expired - Fee Related CN101486446B (en) | 2009-01-12 | 2009-01-12 | Method for coproduction of bleaching powder, active carbon, sodium chloride and sulphuric acid from waste gypsum plaster |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850954A (en) * | 2010-02-11 | 2010-10-06 | 汪晋强 | Method for preparing high-concentration sulfuric acid and anhydrous calcium chloride by using phosphorus gypsum |
| CN101823750A (en) * | 2010-04-30 | 2010-09-08 | 汪晋强 | Method for co-production of raw gypsum in preparation of Yengsu calcium chloride dihydrate by phosphogypsum |
| CN103866137B (en) * | 2014-01-16 | 2015-11-18 | 北京科技大学 | The innoxious resource method of disposal of one heavy metal species waste gypsum minimizing |
| CN112429896B (en) * | 2020-10-29 | 2022-10-25 | 河南佰利联新材料有限公司 | Treatment method of salt mud produced in chlor-alkali production |
| CN113321187B (en) * | 2021-05-24 | 2023-03-31 | 中国成达工程有限公司 | Method for producing bleaching powder by using wet-process acetylene waste calcium carbide slag slurry |
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Address after: 523000, room five, building 508, Jinhai building, Dongcheng District Tong Road, Dongguan, Guangdong Patentee after: Wang Jiaxing Address before: Wushi Village Primary School in Dongguan city of Dongcheng District province Guangdong road 523000 Lane 1 No. 6 main mountain Patentee before: Wang Jiaxing |
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Effective date of registration: 20170329 Address after: 24 Nantong province high tech Zone, Tongzhou District Province, the village of the bridge group of the group of 226300, Patentee after: Liwang Chemical (Nantong) Co., Ltd. Address before: 226300 Century Avenue, Nantong, Jiangsu, No. 197 Patentee before: Nantong International Industrial Co. Ltd. |
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