US4031038A
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Water insoluble chelate exchange resins having a crosslinked polymer matrix and pendant thereto a plurality of methyleneaminopyridine groups
Assignee: Dow Chemical Co
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Filing: 1975-06-16
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Granted: 1977-06-21
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Expires: 1995-06-16
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
2026-10-25 14:57
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: 25
Claim 1
Independent Claim
39 words
A water-insoluble chelate exchange resin having a crosslinked polymer matrix and pendent thereto a plurality of methyleneaminopyridine groups of Formula III: ##STR12## wherein M is the matrix resin; Y is H or C 1 -C 4 alkyl; Q is
Claim 2
Dependent Claim
39 words
A water-insoluble chelate exchange resin having a crosslinked polymer matrix and pendent thereto a plurality of methyleneaminopyridine groups of Formula III: ##STR12## wherein M is the matrix resin; Y is H or C 1 -C 4 alkyl; Q is
Claim 3
Dependent Claim
70 words
--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; ##STR13##
Claim 4
Dependent Claim
70 words
--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; ##STR13##
Claim 5
Dependent Claim
130 words
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 .
Claim 6
Dependent Claim
130 words
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 .
Claim 7
Dependent Claim
15 words
The chelate resin of claim 1 where the polymer matrix is a crosslinked aromatic resin.
Claim 8
Dependent Claim
15 words
The chelate resin of claim 2 where the polymer matrix is a crosslinked styrene-divinylbenzene copolymer.
Claim 9
Dependent Claim
19 words
The chelate resin of claim 2 prepared by reacting a chloromethylaromatic polymer with an aminopyridine of Formula II: ##STR14##
Claim 10
Dependent Claim
16 words
The chelate resin of claim 4 where the aminopyridine is a 2-picolylamine of the formula: ##STR15##
Claim 11
Dependent Claim
30 words
The chelate resin of claim 4 where the aminopyridine is a 2-picolylamine of the formula: ##STR16## where each R' is H or CH 3 and x is 1 or 2.
Claim 12
Dependent Claim
15 words
The chelate resin of claim 3 containing a plurality of groups of the formula: ##STR17##
Claim 13
Dependent Claim
21 words
The chelate resin of claim 7 where R is CH 3 , Q is --CH 2 -- and Y is H.
Claim 14
Dependent Claim
19 words
The chelate resin of claim 7 where R is H, Q is --CH 2 -- and Y is H.
Claim 15
Dependent Claim
23 words
The chelate resin of claim 7 where R is --C 2 H 4 OH, Q is --CH 2 -- and Y is H.
Claim 16
Dependent Claim
21 words
The chelate resin of claim 7 where R is --CH 2 COOH, Q is --CH 2 -- and Y is H.
Claim 17
Dependent Claim
19 words
The chelate resin of claim 7 where R is ##STR18## Q is --CH 2 -- and Y is H.
Claim 18
Dependent Claim
29 words
The chelate resin of claim 3 containing about 0.1-1.0 chelant groups per aromatic group of the matrix resin and having a capacity of about 0.1-4.5 meq Cu/g acid resin.
Claim 19
Dependent Claim
15 words
The chelate resin of claim 13 where the pendent methyleneaminopyridine groups have the formula: ##STR19##
Claim 20
Dependent Claim
15 words
The chelate resin of claim 13 where the pendent methyleneaminopyridine groups have the formula: ##STR20##
Claim 21
Dependent Claim
39 words
A process for preparing the chelate resin of claim 1 by reacting a chloromethylaromatic resin matrix with an aminopyridine of the formula: ##STR21## to give a resin having a dry weight capacity of about 0.1-4.5 meq Cu/g acid resin.
Claim 22
Dependent Claim
20 words
The process of claim 16 where the resin matrix is a styrene-divinylbenzene copolymer bead and the aminopyridine is a 2-picolylamine.
Claim 23
Dependent Claim
10 words
The process of claim 16 where the amine is N-methyl-2-picolylamine.
Claim 24
Dependent Claim
10 words
The process of claim 16 where the amine is N-(2-hydroxyethyl)-2-picolylamine.
Claim 25
Dependent Claim
10 words
The process of claim 16 where the amine is bis-(2-picolylamine).
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |