US4098867A
Expired / Lapsed
US
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Water-insoluble chelate exchange resins from aminopyridines and process for the selective extraction of valuable metals using the same
Assignee: Dow Chemical Co
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Filing: 1977-03-25
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Granted: 1978-07-04
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Expires: 1997-03-25
Abstract
Abstract New chelate exchange resins capable of selective recovery of copper, nickel, and other valuable metals from an acidic aqueous leach liquor are prepared by reacting a crosslinked haloalkyl polymer matrix resin (I) with certain aminopyridines (II) to give a resin (III) ##STR1## with pendent methyleneaminopyridine groups attached to the matrix resin. Particularly useful resins are obtained by reacting chloromethylated styrene-divinylbenzene copolymer beads with an aminomethylpyridine, such as 2-picolylamine, N-methyl-2-picolylamine, N-(2-hydroxyethyl)-2-picolylamine, N-(2-methylaminoethyl)-2-picolylamine, or bis-(2-picolyl)amine. At a typical copper ore leach liquor pH of about 2, the picolylamine resins will absorb 15-30 mg copper/ml resin with a 5-10 fold selectivity for copper over ferric iron.
Inventors
- 👤 Robert R. Grinstead
- 👤 Wilmonte A. Nasutavicus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:44
CPC Classifications
B; B01; B01J; B01J45/00; C; C08; C08F; C08F8/00; C08F8/44; C08G; C08G8/00; C08G8/28; C08G85/00; C08G85/004; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A process for the selective recovery of valuable metals selected from the group consisting of copper, nickel, iron (III), cobalt, silver, gold, mercury, platinum, vanadium, molybdenum, chromium (VI) and cadmium from an aqueous acid liquor comprising: A. contacting the acid liquor at a pH of about 1-5 with a water-insoluble chelate exchange resin having a crosslinked polymer matrix and pendent thereto a plurality of methyleneaminopyridine groups of Formula III: ##STR13## wherein M is the matrix resin;
Claim 2
Dependent Claim
76 words
A process for the selective recovery of valuable metals selected from the group consisting of copper, nickel, iron (III), cobalt, silver, gold, mercury, platinum, vanadium, molybdenum, chromium (VI) and cadmium from an aqueous acid liquor comprising: A. contacting the acid liquor at a pH of about 1-5 with a water-insoluble chelate exchange resin having a crosslinked polymer matrix and pendent thereto a plurality of methyleneaminopyridine groups of Formula III: ##STR13## wherein M is the matrix resin;
Claim 3
Dependent Claim
9 words
Y is H or C 1 -C 4 alkyl;
Claim 4
Dependent Claim
9 words
Y is H or C 1 -C 4 alkyl;
Claim 5
Dependent Claim
229 words
Q is (1) --CH 2 --; (2) --(c 2 h 3 r'nr') x --CH 2 --where each R' is H or CH 3 and x is 1 or 2; or (3) --, --NH--, --C 2 H 4 --; and each R is (1) H, C 1 -C 4 alkyl, or C 2 -C 4 hydroxyalkyl; and when Q is --CH 2 --, R can also be: (2) allyl, benzyl or o-hydroxybenzyl; ##STR14## wherein each R' is H or CH 3 and y is 0 or 1; (4) --(CH 2 ) m OY where m is 2 or 3; (5) --C 2 H 3 R'NR 1 R 2 where R' is H or CH 3 , R 1 is H, C 1 -C 4 alkyl, C 2 -C 4 hydroxyalkyl, phenyl or benzyl, and R 2 is H, C 1 -C 4 alkyl or C 2 -C 4 hydroxyalkyl; (6) --C 2 H 4 SR'" where R'" is C 1 -C 4 alkyl; (7) --C n H 2n COOY where n is 1 or 2; (8) --C n H 2n SO 3 - where n is 1 or 2; or (9) --CH 2 Z where Z is --CONH 2 or --NHCONH 2 , to thereby selectively remove said valuable metals, and then B. eluting the valuable metals in a more concentrated form with a strong inorganic acid or ammonium hydroxide.
Claim 6
Dependent Claim
229 words
Q is (1) --CH 2 --; (2) --(c 2 h 3 r'nr') x --CH 2 --where each R' is H or CH 3 and x is 1 or 2; or (3) --, --NH--, --C 2 H 4 --; and each R is (1) H, C 1 -C 4 alkyl, or C 2 -C 4 hydroxyalkyl; and when Q is --CH 2 --, R can also be: (2) allyl, benzyl or o-hydroxybenzyl; ##STR14## wherein each R' is H or CH 3 and y is 0 or 1; (4) --(CH 2 ) m OY where m is 2 or 3; (5) --C 2 H 3 R'NR 1 R 2 where R' is H or CH 3 , R 1 is H, C 1 -C 4 alkyl, C 2 -C 4 hydroxyalkyl, phenyl or benzyl, and R 2 is H, C 1 -C 4 alkyl or C 2 -C 4 hydroxyalkyl; (6) --C 2 H 4 SR'" where R'" is C 1 -C 4 alkyl; (7) --C n H 2n COOY where n is 1 or 2; (8) --C n H 2n SO 3 - where n is 1 or 2; or (9) --CH 2 Z where Z is --CONH 2 or --NHCONH 2 , to thereby selectively remove said valuable metals, and then B. eluting the valuable metals in a more concentrated form with a strong inorganic acid or ammonium hydroxide.
Claim 7
Dependent Claim
35 words
The process of claim 1 where the chelate resin is a crosslinked aromatic resin with pendent methyleneaminopyridine groups of the formula: ##STR15## and has a dry weight capacity of about 0.1-4.5 meq. Cu/g acid resin.
Claim 8
Dependent Claim
37 words
The process of claim 1 for the selective recovery of copper where the acid liquor is a dilute sulfuric acid leach of a copper ore having a pH of about 1.0-3.0 and containing about 0.1-10 g Cu/l.
Claim 9
Dependent Claim
20 words
The process of claim 3 where the copper adsorbed by the chelate resin is eluted with 1-10 N sulfuric acid.
Claim 10
Dependent Claim
20 words
The process of claim 3 where the copper adsorbed by the chelate resin is eluted with 1-10 N ammonium hydroxide.
Claim 11
Dependent Claim
29 words
The process of claim 2 where the chelate resin is a styrene-divinylbenzene copolymer with pendent methyleneaminopyridine groups of the formula: ##STR16## where R is C 2 -C 4 hydroxyalkyl.
Claim 12
Dependent Claim
21 words
The process of claim 2 where the chelate resin is a styrene-divinylbenzene copolymer with pendent methyleneaminopyridine groups of the formula: ##STR17##
Claim 13
Dependent Claim
21 words
The process of claim 2 where the chelate resin is a styrene-divinylbenzene copolymer with pendent methyleneaminopyridine groups of the formula: ##STR18##
Claim 14
Dependent Claim
21 words
The process of claim 2 where the chelate resin is a styrene-divinylbenzene copolymer with pendent methyleneaminopyridine groups of the formula: ##STR19##
Claim 15
Dependent Claim
68 words
The process of claim 1 for the selective recovery of nickel from an aqueous acid leach liquor containing nickel comprising: A. contacting the leach liquor at a pH of about 2-4 with a water-insoluble chelate exchange resin having pendent methyleneaminopyridine groups of the formula: ##STR20## to absorb the nickel, and then B. eluting the nickel in more concentrated form with a more concentrated inorganic acid or ammonium hydroxide.
Claim 16
Dependent Claim
14 words
The process of claim 10 where the chelate resin has a styrene-divinylbenzene copolymer matrix.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |