US4382016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractant for the selective removal of cobalt(II) from aqueous solutions
Assignee: Wyeth Holdings LLC
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Filing: 1982-06-23
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Granted: 1983-05-03
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Expires: 2002-06-23
Abstract
Abstract Cobalt(II)-bearing aqueous solutions may be treated with an extractant comprising an organic-soluble phophinic acid, or a salt thereof, to separate the cobalt(II) from the aqueous solution. Typical extraction techniques compatible with the instant process include liquid-liquid extraction employing either mixer settlers or columns, packed beds of supported extractants as in ion exchange, liquid membrane extraction and selective supported membrane extraction.
Inventors
- 👤 William A. Rickelton
- 👤 Allan J. Robertson
- 👤 David R. Burley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:03
CPC Classifications
C; C01; C01G; C01G51/00; C01G51/01; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; C22B3/26; C22B3/38; C22B3/384; C22B3/3842; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
A composition for use in extraction comprising an inert material whereupon an organophosphinic acid of the structure: ##STR4## is adsorbed entrained or chemically bound wherein R 1 , R 2 are individually substituted or unsubstituted alkyl, cycloalkyl, alkoxyalkyl, alkylcycloalkyl, aryl, alkylaryl, aralkyl or cycloalkylaryl radicals and X is either hydrogen or a salt-forming radical.
Claim 2
Dependent Claim
54 words
A composition for use in extraction comprising an inert material whereupon an organophosphinic acid of the structure: ##STR4## is adsorbed entrained or chemically bound wherein R 1 , R 2 are individually substituted or unsubstituted alkyl, cycloalkyl, alkoxyalkyl, alkylcycloalkyl, aryl, alkylaryl, aralkyl or cycloalkylaryl radicals and X is either hydrogen or a salt-forming radical.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the inert material is diatomaceous earth.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein the inert material is a polystyrene bead.
References Cited (Backward Citations)
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US3960762A
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US3931196A
Cited
US4051230A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |