GB974448A - Recovery of chromium values - Google Patents
Recovery of chromium valuesInfo
- Publication number
- GB974448A GB974448A GB3971062A GB3971062A GB974448A GB 974448 A GB974448 A GB 974448A GB 3971062 A GB3971062 A GB 3971062A GB 3971062 A GB3971062 A GB 3971062A GB 974448 A GB974448 A GB 974448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- organic phase
- values
- solution
- dichromate
- chromate
- 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
- 238000011084 recovery Methods 0.000 title abstract 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title abstract 2
- 229910052804 chromium Inorganic materials 0.000 title abstract 2
- 239000011651 chromium Substances 0.000 title abstract 2
- 239000012074 organic phase Substances 0.000 abstract 11
- 239000007864 aqueous solution Substances 0.000 abstract 7
- 239000000243 solution Substances 0.000 abstract 7
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract 6
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 abstract 6
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 4
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 abstract 4
- 238000000034 method Methods 0.000 abstract 4
- 150000007522 mineralic acids Chemical class 0.000 abstract 3
- 150000003839 salts Chemical class 0.000 abstract 3
- 150000001412 amines Chemical class 0.000 abstract 2
- 239000008346 aqueous phase Substances 0.000 abstract 2
- 238000009713 electroplating Methods 0.000 abstract 2
- 150000007529 inorganic bases Chemical class 0.000 abstract 2
- 239000003960 organic solvent Substances 0.000 abstract 2
- 150000003335 secondary amines Chemical class 0.000 abstract 2
- 150000003512 tertiary amines Chemical class 0.000 abstract 2
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 238000005341 cation exchange Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 150000002148 esters Chemical class 0.000 abstract 1
- 150000002430 hydrocarbons Chemical group 0.000 abstract 1
- 239000003014 ion exchange membrane Substances 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 239000011574 phosphorus Substances 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F11/00—Compounds containing elements of Groups 6 or 16 of the Periodic Table
- C07F11/005—Compounds containing elements of Groups 6 or 16 of the Periodic Table compounds without a metal-carbon linkage
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
A process for the recovery of chromate and/or dichromate values from an aqueous solution containing said values comprises contacting said solution with a water-immiscible organic phase comprising a solution of a secondary or tertiary amine in a water-immiscible organic solvent in order to extract said values into the organic phase, separating the resultant chromium-pregnant organic phase from the aqueous phase and recovering the chromate and/or dichromate values from the organic phase. The stripping is preferably effected by the use of an aqueous solution of an inorganic acid, base or salt, and the resultant aqueous solution may be treated to yield chromic acid. The initial aqueous solution containing chromate and/or dichromate values may be chromic acid solution from rinses in chromium electroplating processes. The aqueous concentrate obtained by stripping the organic phase is preferably passed through an ion-exchange membrane or a cation exchange column to give chromic acid which may be recycled to a plating bath in the case when the original solution was derived from an electroplating process. Examples are given.ALSO:A process for the recovery of chromate and/or dichromate values from an aqueous solution containing said values comprises contacting said solution with a water-immiscible organic phase comprising a solution of a secondary or tertiary amine in a water-immiscible organic solvent in order to extract said values into the organic phase, separating the resultant chromium-pregnant organic phase from the aqueous phase and recovering the chromate and/or dichromate values from the organic phase. Preferred amines are those in which the hydrocarbon groups each contain 7-22 carbon atoms. The amine may be used in the form of a salt with an inorganic acid. The organic phase preferably contains a longchain aliphatic alcohol or a phosphorus acid ester as a conditioner. The recovery of the chromate and/or dichromate values from the organic phase is preferably effected by the use of an aqueous solution of a stripping agent such as an inorganic acid, base or salt, and the resultant aqueous solution may be treated to yield chromic acid solution (see Division C1). Examples are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14635061A | 1961-10-19 | 1961-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB974448A true GB974448A (en) | 1964-11-04 |
Family
ID=22516979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3971062A Expired GB974448A (en) | 1961-10-19 | 1962-10-19 | Recovery of chromium values |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB974448A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2348155A1 (en) * | 1976-04-15 | 1977-11-10 | Solex Res Corp Japan | PROCESS FOR RECOVERING REUSABLE CHROMIC ACID FROM RESIDUAL CHROMIC ACID SOLUTIONS CONTAINING IMPURITIES AND NEW PRODUCTS THUS OBTAINED |
| FR2502136A1 (en) * | 1981-03-18 | 1982-09-24 | Krebs Cie Sa | METHOD AND SOLVENT FOR EXTRACTING CHROMATES PRESENT IN AQUEOUS SOLUTION |
-
1962
- 1962-10-19 GB GB3971062A patent/GB974448A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2348155A1 (en) * | 1976-04-15 | 1977-11-10 | Solex Res Corp Japan | PROCESS FOR RECOVERING REUSABLE CHROMIC ACID FROM RESIDUAL CHROMIC ACID SOLUTIONS CONTAINING IMPURITIES AND NEW PRODUCTS THUS OBTAINED |
| FR2502136A1 (en) * | 1981-03-18 | 1982-09-24 | Krebs Cie Sa | METHOD AND SOLVENT FOR EXTRACTING CHROMATES PRESENT IN AQUEOUS SOLUTION |
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