CN1046314A - The improvement of chromium-containing sodium bisulfate waste liquid and comprehensive utilization thereof - Google Patents
The improvement of chromium-containing sodium bisulfate waste liquid and comprehensive utilization thereof Download PDFInfo
- Publication number
- CN1046314A CN1046314A CN 89109509 CN89109509A CN1046314A CN 1046314 A CN1046314 A CN 1046314A CN 89109509 CN89109509 CN 89109509 CN 89109509 A CN89109509 A CN 89109509A CN 1046314 A CN1046314 A CN 1046314A
- Authority
- CN
- China
- Prior art keywords
- chromium
- waste liquid
- containing sodium
- sodium bisulfate
- improvement
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/08—Chromium sulfates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention directly sweetens to reduce Cr in the chromium-containing sodium bisulfate waste liquid under acidic conditions
+ 6, after filtering, remove and do not contain Cr
+ 6, Cr
+ 3Water-insoluble impurity, filtrate is used the oxyhydroxide neutralization precipitation, recycles Cr
+ 6, Cr
+ 3, produce Cr (OH)
3, Cr
2O
3, Cr (OH) SO
4Or adjustment Cr (OH) SO
4The content of fancy produce and make other chromium goods.Because gained Cr of the present invention (OH)
3Pure, can make full use of, do not cause for the second time and pollute.And control expense is low, every 1m
3Waste liquid only needs 384 yuan.
Description
The invention belongs to the comprehensive management of environmental protection technology.
The chromium-containing sodium bisulfate waste liquid is the tankage that chromic trioxide is produced.It is Cr
+ 6, Cr
+ 3, H
2SO
4With Na
2SO
4Deng and the mixture of other impurity coexistence.One ton of chromic trioxide of every production just has this waste liquid 0.5-0.61M
3Its corrodibility is strong, and toxicity is big, and discharging after stain environment is so become chromium salt factory one of insoluble problem in environmental improvement.At present, the method for administering usually is to get supernatant liquid to be used to make common basic chromium sulfate; Lower floor's turbid solution S-WAT reduction → neutralization under acidic conditions → precipitation → filtration, filtrate qualified discharge, filter cake are the Cr(OH that contains plurality of impurities)
3Stack.Because this Cr(OH)
3Can not utilize, form for the second time and pollute.This method treatment cost height, every 1M
3Need to administer 815 yuan of materials cost.About 20,000 tons of present national chromic trioxide annual production by this improvement method, then exhausts and administers 9,943,3000 yuan of materials cost.
Technical characterictic of the present invention is, directly sweetens to reduce Cr in the chromium-containing sodium bisulfate waste liquid
+ 6Filter then, remove and wherein do not contain Cr
+ 6, Cr
+ 3Water-insoluble, about 5-7%, thus make the chromium-containing sodium bisulfate clear liquor, be used to produce Cr(OH)
3, Cr(OH) SO
4, or adjust Cr(OH) SO
4The Cr of fancy produce
2O
3Content, and make other chromium goods.
Principle of the present invention is that under acidic conditions, the sugaring reduction contains chromium sulphur waste liquor of sodium hydrogen, makes H wherein
+Generate water, and when adjusting PH=4, thereby reduce the severe corrosive of chromium-containing sodium bisulfate, CrO simultaneously
3Also lost strong oxidation, generated Cr(OH) SO
4Again after filtration, remove water-insoluble impurity, then with obtaining purified Cr(OH behind NaOH neutralization → precipitation → filter-press water-washing)
3Its main chemical reactions formula is:
The present invention has systematically studied the concentration of sugared injected volume to the chromium-containing sodium bisulfate waste liquid, the relation of reduction effect and to the effect of impurity in the waste liquid; Studied the processed and applied of the clear liquor after usefulness sugar directly reduces etc.Studies show that, can all recycle Cr with this method
+ 6, Cr
+ 3And not having external oxious component in the clear liquor of impurity after leaching, the quantity of slag is very little simultaneously, and does not contain Cr
+ 6, Cr
+ 3, therefore environment is not brought for the second time and pollutes.
Governance flowchart of the present invention is to add in the chromium-containing sodium bisulfate waste liquid, through reduction → filtration → neutralization → precipitation → filtration with sugar.The filtrate qualified discharge.The filter cake oven dry is levigate, sells Cr(OH)
3Or be used to adjust superfine Cr(OH) SO
4Content and produce Cr(OH) SO
4, or produce other chromium goods.
Embodiment: with reducing in the sugar adding chromium-containing sodium bisulfate waste liquid, temperature of reaction remains on 100-110 ℃, reacts after 30-50 minute, gets a little sample in glass test tube, and the dilute with water appropriateness is made indicator with hexichol together with hydrazine, checks when solution does not take on a red color, and proves Cr
+ 6Be reduced to Cr
+ 3, adjust PH=4, add NaOH after the filtration again and make it be settled out Cr(OH)
3, refilter washing, wash out sodium sulfate, purification Cr(OH)
3, reach and administer the purpose that reclaims.Administer the injected volume of material, different and different according to the concentration of chromium-containing sodium bisulfate waste liquid.When concentration is 41Be, only need at 1M
3Sugaring 40kg in the waste liquid, solid caustic soda 100kg just can be settled out Cr(OH)
3, the filtrate qualified discharge.Reclaim 1M
3The chromium-containing sodium bisulfate clear liquor only need be administered 384 yuan of materials cost.Its technical process is as shown:
Advantage of the present invention: can take full advantage of the equipment of present improvement chromium-containing sodium bisulfate waste liquid method, it is less to administer fee of material, can accomplish comprehensive utilization, does not pollute for the second time. Improvement material of the present invention is easy to purchase, and consumption is few, is convenient to transportation and stores, and is easy to use. If the present invention applies in the whole nation, can be country every year and save fee of material and 5,990,000 yuan of the recycling expense of administering.
Claims (3)
1, the present invention is a kind of Cr that reclaims in the chromium-containing sodium bisulfate waste liquid that administers
+ 6, Cr
+ 2Method.It is characterized in that before improvement, directly add to ward off and in waste liquid, reduce Cr
+ 5, remove impurity after filtration.
2, by (1) described method in the claim, gained filtrate hydro-oxidation thing neutralization precipitation system Cr(OH)
3, Cr
2O
3, Cr(OH) SO
4, and improve Cr(OH) SO
4Select quality content.
3, press (1) or (2) described method in claims, other chromium goods of processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89109509 CN1046314A (en) | 1989-12-19 | 1989-12-19 | The improvement of chromium-containing sodium bisulfate waste liquid and comprehensive utilization thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89109509 CN1046314A (en) | 1989-12-19 | 1989-12-19 | The improvement of chromium-containing sodium bisulfate waste liquid and comprehensive utilization thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1046314A true CN1046314A (en) | 1990-10-24 |
Family
ID=4858045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89109509 Pending CN1046314A (en) | 1989-12-19 | 1989-12-19 | The improvement of chromium-containing sodium bisulfate waste liquid and comprehensive utilization thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046314A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795973B (en) * | 2007-04-27 | 2012-07-25 | 日本化学工业株式会社 | Chromium hydroxide, method for producing the same, trivalent chromium-containing solution using the same, and chromium plating method |
| CN104445284A (en) * | 2013-09-24 | 2015-03-25 | 中国科学院过程工程研究所 | Method for separating and recovering anhydrous sodium sulfate, concentrated sulfuric acid and chromium from chromium-containing sodium bisulfate |
| CN114105105A (en) * | 2020-08-31 | 2022-03-01 | 中国科学院过程工程研究所 | Chromium-containing waste acid cleaning and regenerating method |
-
1989
- 1989-12-19 CN CN 89109509 patent/CN1046314A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795973B (en) * | 2007-04-27 | 2012-07-25 | 日本化学工业株式会社 | Chromium hydroxide, method for producing the same, trivalent chromium-containing solution using the same, and chromium plating method |
| CN104445284A (en) * | 2013-09-24 | 2015-03-25 | 中国科学院过程工程研究所 | Method for separating and recovering anhydrous sodium sulfate, concentrated sulfuric acid and chromium from chromium-containing sodium bisulfate |
| CN104445284B (en) * | 2013-09-24 | 2016-06-01 | 中国科学院过程工程研究所 | The method of a kind of Separation and Recovery anhydrous sodium sulphate, the vitriol oil and chromium in chromium-containing sodium bisulfate |
| CN114105105A (en) * | 2020-08-31 | 2022-03-01 | 中国科学院过程工程研究所 | Chromium-containing waste acid cleaning and regenerating method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |