US4220726A
Expired / Lapsed
US
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Impregnated resins for extraction of metals and processes of production and use thereof
Assignee: Yeda Research and Development Co Ltd
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Filing: 1977-07-21
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Granted: 1980-09-02
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Expires: 1997-07-21
Abstract
Abstract Extraction agents for the extraction of copper, zinc, uranium and nickel, or any of these, from aqueous solutions containing same, comprise a macroporous polymer supporting a specific extractant for such metal, the polymer being rendered hydrophilic by the method of impregnation or by attachment thereon of suitable functional groups, or by attaching such functional groups to the extraction agent, or by coabsorbing on said polymer an agent adapted to render the polymer hydrophilic. Such extraction agents may be produced by impregnating a macroporous polystyrene with a specific metal extraction agent in the presence of a diluent for the extraction agent, removing external diluent, contacting the product with a solution of the metal to be extracted, and removing the metal from the extraction agent by a suitable eluting agent. Alternatively, a macroporous polymer may be impregnated with a selective extraction agent complexed with the metal to be extracted in the presence of a diluent, the external diluent removed and the metal eluted with a suitable eluent. Furthermore, macroporous polymers containing finely dispersed metal powders may be prepared, which polymers can be used as catalyst in organic synthesis.
Inventors
- 👤 Abraham Warshawsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:24
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28054; B01J20/28095; B01J20/28097; C; C01; C01G; C01G3/00; C01G3/003; C01G53/00; C01G53/01; C01G9/00; C01G9/003; C22; C22B; C22B15/00; C22B15/0063; C22B15/0084; C22B15/0089; C22B3/00; C22B3/20; C22B3/42; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/0265; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
85 words
A process for the production of an impregnated resin metal ion extraction agent, comprising: impregnating a macroporous, hydrophobic polystyrene polymer or copolymer with a hydrophobic, metal ion specific extractant in the presence of a diluent for the extractant; removing any diluent which is not adsorbed by the polymer or copolymer; contacting the product with a solution containing a metal ion for which said extractant is specific to form an extractant-metal ion complex; and eluting the metal from the extractant-metal ion complex with a suitable eluant.
Claim 2
Dependent Claim
85 words
A process for the production of an impregnated resin metal ion extraction agent, comprising: impregnating a macroporous, hydrophobic polystyrene polymer or copolymer with a hydrophobic, metal ion specific extractant in the presence of a diluent for the extractant; removing any diluent which is not adsorbed by the polymer or copolymer; contacting the product with a solution containing a metal ion for which said extractant is specific to form an extractant-metal ion complex; and eluting the metal from the extractant-metal ion complex with a suitable eluant.
Claim 3
Dependent Claim
13 words
A process in accordance with claim 1, wherein said eluant comprises sulfuric acid.
Claim 4
Dependent Claim
29 words
A process in accordance with claim 1 wherein said diluent is selected from the group consisting of methylene chloride, benzene, pentane, hexane, carbon disulfide, chloroform, carbon tetrachloride, and dichloroethane.
Claim 5
Dependent Claim
10 words
The impregnated resin produced by the process of claim 1.
Claim 6
Dependent Claim
19 words
An impregnated resin in accordance with claim 4 wherein said extractant is selected from the group consisting of: ##STR6##
Claim 7
Dependent Claim
18 words
A process in accordance with claim 1 wherein said extractant is selected from the group consisting of: ##STR7##
Claim 8
Dependent Claim
81 words
A process for the production of an impregnated resin metal ion extraction agent, comprising: forming a complex of a metal ion specific extractant and a metal ion for which said extractant is specific in the present of a diluent for the extractant; impregnating a macroporous, hydrophobic polystyrene polymer or copolymer with said diluent containing said complex; removing any diluent which is not adsorbed in the polymer or copolymer; and eluting the metal from the extractant-metal ion complex with a suitable eluant.
Claim 9
Dependent Claim
81 words
A process for the production of an impregnated resin metal ion extraction agent, comprising: forming a complex of a metal ion specific extractant and a metal ion for which said extractant is specific in the present of a diluent for the extractant; impregnating a macroporous, hydrophobic polystyrene polymer or copolymer with said diluent containing said complex; removing any diluent which is not adsorbed in the polymer or copolymer; and eluting the metal from the extractant-metal ion complex with a suitable eluant.
Claim 10
Dependent Claim
53 words
A process in accordance with claim 7 wherein said extractant is selected from the group consisting of: ##STR8## wherein R 1 =H or CH 3 , R 2 =H or CH 3 and n=1-9; ##STR9## wherein R 3 =H or CH 3 ; di-(2-ethylhexyl) phosphoric acid; di-(hexyldioxyethylene) phosphoric acid; tributylphosphate; and tri-(hexyldioxyethylene) phosphate.
Claim 11
Dependent Claim
13 words
A process in accordance with claim 7 wherein said eluant comprises sulfuric acid.
Claim 12
Dependent Claim
29 words
A process in accordance with claim 7 wherein said diluent is selected from the group consisting of methylene chloride, benzene, pentane, hexane, carbon disulfide, chloroform, carbon tetrachloride, and dichloroethane.
Claim 13
Dependent Claim
35 words
An impregnated resin metal ion extraction agent comprising a macroporous polymer or copolymer of polystyrene having a polymeric backbone rendered hydrophilic by incorporation therein of oxyalkylene units, and a metal ion specific extractant supported thereby.
Claim 14
Dependent Claim
35 words
An impregnated resin metal ion extraction agent comprising a macroporous polymer or copolymer of polystyrene having a polymeric backbone rendered hydrophilic by incorporation therein of oxyalkylene units, and a metal ion specific extractant supported thereby.
Claim 15
Dependent Claim
28 words
An impregnated resin metal ion extraction agent in accordance with claim 11 wherein said extractant is selected from the group consisting of: ##STR10## di-(2-ethylhexyl) phosphoric acid; and tributylphosphate.
Claim 16
Dependent Claim
43 words
An impregnated resin metal ion extraction agent comprising a macroporous polymer or copolymer of polystyrene, and a metal ion specific extractant supported thereby wherein the molecules of said extractant have been modified by the incorporation therein of oxyalkylene units or amine side chains.
Claim 17
Dependent Claim
43 words
An impregnated resin metal ion extraction agent comprising a macroporous polymer or copolymer of polystyrene, and a metal ion specific extractant supported thereby wherein the molecules of said extractant have been modified by the incorporation therein of oxyalkylene units or amine side chains.
Claim 18
Dependent Claim
50 words
An extraction agent in accordance with claim 13 wherein said extractant is selected from the group consisting of: ##STR11## wherein R 1 =H or CH 3 , R 2 =H or CH 3 and n=1-9; ##STR12## wherein R 3 =H or CH 3 ; di-(hexyldioxyethylene)phosphoric acid; tri-(hexyldioxyethylene) phosphate; and di-(hexyldioxyethylene)dioximinobenzil.
Claim 19
Dependent Claim
50 words
A process for the production of an impregnated resin metal ion extraction agent, comprising: impregnating a macroporous hydrophobic polystyrene polymer or copolymer with a solution containing a hydrophobic metal ion specific extractant and a dialkyl-polyalkylene glycol in a suitable diluent adsorbable by said polymer or copolymer; and removing excess diluent.
Claim 20
Dependent Claim
50 words
A process for the production of an impregnated resin metal ion extraction agent, comprising: impregnating a macroporous hydrophobic polystyrene polymer or copolymer with a solution containing a hydrophobic metal ion specific extractant and a dialkyl-polyalkylene glycol in a suitable diluent adsorbable by said polymer or copolymer; and removing excess diluent.
Claim 21
Dependent Claim
23 words
A process in accordance with claim 15 wherein said extractant is selected from the group consisting of: ##STR13## di-(2-ethylhexyl) phosphoric acid; and tributylphosphate.
Claim 22
Dependent Claim
10 words
The impregnated resin produced by the process of claim 15.
References Cited (Backward Citations)
US3146213A
Cited
US3960762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |