US4088733A
Expired / Lapsed
US
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Process for liquid-liquid extraction of cobalt from nickel
Assignee: Métallurgie Hoboken-Overpelt NV
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Filing: 1976-02-23
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Granted: 1978-05-09
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Expires: 1996-02-23
Abstract
Abstract A process for separating cobalt from nickel in an aqueous acid solution containing the above metals, which comprises contacting said solution with an organic phase comprising (a) 65-98% by volume of a concentrated alpha-hydroxyoxime extractant, a 1% by volume solution of which in xylene has per liter a maximum loading capacity of about 0.864 g. of copper, and (b) 2-35% by volume of an organophosphoric acid of the general formula: ##STR1## wherein R 1 represents an alkyl, aryl or aralkyl radical, while maintaining the pH of said solution between 1 and 6, whereby cobalt is extracted from the aqueous phase to the organic phase and separating the resultant cobalt pregnant organic phase from the aqueous phase.
Inventors
- 👤 Achille De Schepper
- 👤 Antoine Van Peteghem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:40
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/40; C22B3/409; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A process for separating cobalt from nickel in an aqueous acid solution containing the above metals, which comprises contacting said solution with an organic phase comprising (a) 65-98% by volume of a concentrated alpha-hydroxyoxime extractant, and (b) 2-35% by volume of an organophosphoric acid of the general formula: ##STR4## wherein R 1 represents an alkyl, aryl or aralkyl radical, while maintaining the pH of said solution between 1 and 6, whereby cobalt is extracted from the aqueous phase to the organic phase and separating the resultant cobalt pregnant organic phase from the aqueous phase.
Claim 2
Dependent Claim
94 words
A process for separating cobalt from nickel in an aqueous acid solution containing the above metals, which comprises contacting said solution with an organic phase comprising (a) 65-98% by volume of a concentrated alpha-hydroxyoxime extractant, and (b) 2-35% by volume of an organophosphoric acid of the general formula: ##STR4## wherein R 1 represents an alkyl, aryl or aralkyl radical, while maintaining the pH of said solution between 1 and 6, whereby cobalt is extracted from the aqueous phase to the organic phase and separating the resultant cobalt pregnant organic phase from the aqueous phase.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the organic phase comprises 2-20% by volume of trichloroethylene.
Claim 4
Dependent Claim
14 words
A process according to claim 1 wherein the organophosphoric acid is di(2-ethylhexyl) phosphoric acid.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein the organic phase contains an emulsion inhibitor.
Claim 6
Dependent Claim
15 words
A process according to claim 1 wherein the organic phase contains isodecanol as emulsion inhibitor.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein the pH of the solution is maintained between 2.5 and 4.5.
Claim 8
Dependent Claim
31 words
A process according to claim 1 wherein the cobalt is stripped from the organic phase by treatment with an aqueous acid solution, the acidity of which is between 1 and 6N.
Claim 9
Dependent Claim
68 words
A process according to claim 1 wherein the cobalt is stripped from the organic phase by treatment with an aqueous acid solution, the acidity of which is between 1 and 6 N, and the docobaltized organic phase is then treated with an aqueous acid solution, the acidity of which is greater than 6 N to strip the minor quantity of nickel which has been co-extracted with the cobalt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |