GB960545A - Recovery of chromium values - Google Patents
Recovery of chromium valuesInfo
- Publication number
- GB960545A GB960545A GB3970962A GB3970962A GB960545A GB 960545 A GB960545 A GB 960545A GB 3970962 A GB3970962 A GB 3970962A GB 3970962 A GB3970962 A GB 3970962A GB 960545 A GB960545 A GB 960545A
- Authority
- GB
- United Kingdom
- Prior art keywords
- quaternary ammonium
- ammonium compound
- carbon atoms
- organic phase
- chloride
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Hexavalent chromium values are recovered from aqueous solutions by treating said solution with an organic phase containing a trisfatty quaternary ammonium compound. The organic phase is separated from the aqueous phase and then stripped of its chromium values using an aqueous stripping solution which may contain alkali metal, alkaline earth metal or ammonia salts. Specified stripping agents are sodium nitrate or chloride, ammonium nitrates or chloride and calcium chloride. The organic phase in addition to the quarternary ammonium compound may include a diluent of kerosene or fuel oil, and a conditioner which may be a long chain aliphatic alcohol or phosphorus acid ester. The quaternary ammonium compound preferably contains an alkyl group of 1-4 carbon atoms and 3 fatty groups which have 8-18 carbon atoms and may be the same or different. Quaternary ammonium compounds which are used may be chloride, sulphate, bisulphate, sulphite, bisulphite or nitrate, bisulphate being preferred. Liquid-liquid extraction in a continuous countercurrent unit is referred to.ALSO:In the recovery of hexavalent chromium values aqueous solutions are treated with an organic phase containing a trisfatty quaternary ammonium compound yielding a quaternary ammonium compound chromate. The quaternary ammonium compound has one alkyl group having 1-4 carbon atoms and three aliphatic hydrocarbon groups having 8-18 carbon atoms.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14634961A | 1961-10-19 | 1961-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB960545A true GB960545A (en) | 1964-06-10 |
Family
ID=22516974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3970962A Expired GB960545A (en) | 1961-10-19 | 1962-10-19 | Recovery of chromium values |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB960545A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2502136A1 (en) * | 1981-03-18 | 1982-09-24 | Krebs Cie Sa | METHOD AND SOLVENT FOR EXTRACTING CHROMATES PRESENT IN AQUEOUS SOLUTION |
| EP0332447A1 (en) * | 1988-03-09 | 1989-09-13 | Unc Reclamation, Inc. | Selective removal of metal cations from aqueous effluent solutions |
| CN102494926A (en) * | 2011-11-16 | 2012-06-13 | 深圳出入境检验检疫局工业品检测技术中心 | Method for extracting soluble hexavalent chromium compounds from polymer materials |
-
1962
- 1962-10-19 GB GB3970962A patent/GB960545A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2502136A1 (en) * | 1981-03-18 | 1982-09-24 | Krebs Cie Sa | METHOD AND SOLVENT FOR EXTRACTING CHROMATES PRESENT IN AQUEOUS SOLUTION |
| EP0332447A1 (en) * | 1988-03-09 | 1989-09-13 | Unc Reclamation, Inc. | Selective removal of metal cations from aqueous effluent solutions |
| US4956154A (en) * | 1988-03-09 | 1990-09-11 | Unc Reclamation | Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions |
| CN102494926A (en) * | 2011-11-16 | 2012-06-13 | 深圳出入境检验检疫局工业品检测技术中心 | Method for extracting soluble hexavalent chromium compounds from polymer materials |
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