Patent US4675172A successfully refreshed from Google Patents.
US4675172A
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Triazolopyrimidine extractants
Assignee: Syngenta Ltd
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Filing: 1985-12-09
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Granted: 1987-06-23
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Expires: 2005-12-09
Abstract
Abstract Metal values, particularly copper values, are extracted from aqueous solutions containing halide or pseudohalide anion using 6,7 substituted triazolopyrimidine wherein the 6-substituent is a group --CO--OR1 where R1 is a hydrocarbyl group containing from 1 to 35 carbon atoms, preferably an alkyl group and wherein the 7-substituent (R2) is hydrogen or a hydrocarbyl group containing from 1 to 35 atoms wherein R1 and R2 taken together contain a total of from 5 to 35 saturated carbon atoms.
Inventors
- 👤 Peter M. Quan
- 👤 Anthony J. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:56
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C01; C01G; C01G11/00; C01G11/003; C01G3/00; C01G3/003; C01G51/00; C01G51/01; C01G9/00; C01G9/003; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/36; C22B3/362; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A process for extracting metal values from aqueous solutions of metal salts containing halide or pseudo halide anions which comprises contacting the aqueous solution in a water-immiscible organic solvent of a substituted triazolopyrimidine of the formula ##STR6## wherein R 1 is a hydrocarbyl group containing from 1 to 35 saturated carbon atoms and R 2 is hydrogen or a hydrocarbyl group containing from 1 to 35 carbon atoms, provided that R 1 and R 2 taken together contain a total of from 5 to 35 saturated carbon atoms.
Claim 2
Dependent Claim
88 words
A process for extracting metal values from aqueous solutions of metal salts containing halide or pseudo halide anions which comprises contacting the aqueous solution in a water-immiscible organic solvent of a substituted triazolopyrimidine of the formula ##STR6## wherein R 1 is a hydrocarbyl group containing from 1 to 35 saturated carbon atoms and R 2 is hydrogen or a hydrocarbyl group containing from 1 to 35 carbon atoms, provided that R 1 and R 2 taken together contain a total of from 5 to 35 saturated carbon atoms.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein R 1 and R 2 are alkyl groups or substituted alkyl groups.
Claim 4
Dependent Claim
25 words
A process according to claim 2 wherein the substituted alkyl group contains as substituents halogen, nitro, cyano, hydroxy, alkoxy, aryl, aryloxy, alkoxycarbonyl or alkylcarbonyloxy groups.
Claim 5
Dependent Claim
15 words
A process according to claim 1 wherein R 2 is hydrogen or an aryl group.
Claim 6
Dependent Claim
27 words
A process according to claim 1 to 4 wherein R 1 and R 2 taken together contain a total of from 16 to 35 saturated carbon atoms.
Claim 7
Dependent Claim
16 words
A process according to claim 1 wherein the metal values are copper, cobalt, cadmium or zinc.
Claim 8
Dependent Claim
36 words
A process according to claim 1 wherein --OR 1 is of the formula ##STR7## wherein R 3 and R 4 are both alkyl groups and R 3 contain two fewer carbon atoms that R 4 .
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |