US4525330A
Expired / Lapsed
US
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Process for the extraction of metal values and novel metal extractants
Assignee: Syngenta Ltd
•
Filing: 1982-09-16
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Granted: 1985-06-25
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Expires: 2002-09-16
Abstract
Abstract Metal values are extracted from aqueous solutions of metal salts containing halide or pseudo halide ions by pyridine derivatives containing the substituent --(COX) A where X is the group --OR 1 or --NR 2 R 3 and n is 1, 2 or 3. R 1 is a hydrocarbyl group containing from 5 to 36 carbon atoms and R 2 and R 3 are hydrogen or a hydrocarbyl group wherein R 2 and R 3 together contain from 5 to 36 carbon atoms. The process is especially useful for the recovery of metals from leach solutions derived from sulphur-containing ores such as chalcopyrite.
Inventors
- 👤 Raymond F. Dalton
- 👤 Raymond Price
- 👤 Peter M. Quan
- 👤 David Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:04
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; C07D213/81; C07D213/82; 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: 21
Claim 1
Independent Claim
178 words
In a solvent extraction process for extracting copper values from aqueous solutions of copper salts containing halide or pseudo halide anion which comprises the steps of (1) contacting the aqueous solution containing copper salts with a solution of an extractant in a water-immiscible organic solvent to extract the copper into the solvent in the form of a complex of copper and the extractant; (2) separating the aqueous solution from the solution of the complex in the water-immiscible solvent; and (3) contacting the resultant organic phase with an aqueous strip solution whereby the complex of copper with the extractant is unstable and copper transfers into the aqueous strip solution, the improvement in which the extractant is a substituted pyridine of the formula: ##STR10## wherein X is the group --OR 1 , R 1 being a hydrocarbyl group containing from 5 to 36 carbon atoms, and n is 1, 2 or 3; and wherein Y is hydrogen or is one or more substituents selected from the group consisting of halogen, alkyl, aryl, alkoxy, aryloxy, aralkyl, cyano, nitro and carboxylic acid.
Claim 2
Dependent Claim
178 words
In a solvent extraction process for extracting copper values from aqueous solutions of copper salts containing halide or pseudo halide anion which comprises the steps of (1) contacting the aqueous solution containing copper salts with a solution of an extractant in a water-immiscible organic solvent to extract the copper into the solvent in the form of a complex of copper and the extractant; (2) separating the aqueous solution from the solution of the complex in the water-immiscible solvent; and (3) contacting the resultant organic phase with an aqueous strip solution whereby the complex of copper with the extractant is unstable and copper transfers into the aqueous strip solution, the improvement in which the extractant is a substituted pyridine of the formula: ##STR10## wherein X is the group --OR 1 , R 1 being a hydrocarbyl group containing from 5 to 36 carbon atoms, and n is 1, 2 or 3; and wherein Y is hydrogen or is one or more substituents selected from the group consisting of halogen, alkyl, aryl, alkoxy, aryloxy, aralkyl, cyano, nitro and carboxylic acid.
Claim 3
Dependent Claim
178 words
In a solvent extraction process for extracting copper values from aqueous solutions of copper salts containing halide or pseudo halide anion, which comprises the steps of (1) contacting the aqueous solution containing copper salts with a solution of an extractant in a water-immiscible organic solvent to extract the copper into the solvent in the form of a complex of copper and the extractant; (2) separating the aqueous solution from the solution of the complex in the water-immiscible solvent; and (3) contacting the resultant organic phase with an aqueous strip solution whereby the complex of copper with the extractant is unstable and copper tranfers into the aqueous strip solution, the improvement in which the extractant is a substituted pyridine of the formula: ##STR11## wherein X is the group --OR 1 , R 1 being a hydrocarbyl group containing from 5 to 36 carbon atoms, and n is 1, 2 or 3; and wherein Y is hydrogen or is one or more substituents selected from the group consisting of halogen, alkyl, aryl, alkoxy, aryloxy, aralkyl, cyano, nitro and carboxylic acid.
Claim 4
Dependent Claim
178 words
In a solvent extraction process for extracting copper values from aqueous solutions of copper salts containing halide or pseudo halide anion, which comprises the steps of (1) contacting the aqueous solution containing copper salts with a solution of an extractant in a water-immiscible organic solvent to extract the copper into the solvent in the form of a complex of copper and the extractant; (2) separating the aqueous solution from the solution of the complex in the water-immiscible solvent; and (3) contacting the resultant organic phase with an aqueous strip solution whereby the complex of copper with the extractant is unstable and copper tranfers into the aqueous strip solution, the improvement in which the extractant is a substituted pyridine of the formula: ##STR11## wherein X is the group --OR 1 , R 1 being a hydrocarbyl group containing from 5 to 36 carbon atoms, and n is 1, 2 or 3; and wherein Y is hydrogen or is one or more substituents selected from the group consisting of halogen, alkyl, aryl, alkoxy, aryloxy, aralkyl, cyano, nitro and carboxylic acid.
Claim 5
Dependent Claim
32 words
A process according to claim 1 wherein n is 1, X is the group --OR 1 and R 1 is a branched chain alkyl group containing from 9 to 24 carbon atoms.
Claim 6
Dependent Claim
47 words
A process according to claim 1 wherein n is 1, 2 or 3, X is the group --OR 1 and R 1 is the group ##STR12## wherein R 4 and R 5 are alkyl groups, and R 4 contains two fewer carbon atoms than R 5 .
Claim 7
Dependent Claim
35 words
A process according to claim 1 wherein n is 1, Y is hydrogen, X is the group --OR 1 and R 1 is selected from the group consisting of tridecyl, 2-hexyldecyl, isohexadecyl, isooctadecyl and 2-octyldodecyl.
Claim 8
Dependent Claim
33 words
A process according to claim 1 wherein n is 2, X is the group --OR 1 and the two groups R 1 together contain a total of from 16 to 36 carbon atoms.
Claim 9
Dependent Claim
22 words
A process according to claim 6 wherein the two respective groups R 1 are the same and contain a mixture of isomers.
Claim 10
Dependent Claim
67 words
A process according to claim 1 wherein n is 1, X is the group --NR 2 R 3 and R 2 is hydrogen or an alkyl group and R 3 is an alkyl group and R 2 and R 3 taken together contain a total of from 15 to 36 carbon atoms, provided that when R 2 is hydrogen, R 3 is a branched chain alkyl group.
Claim 11
Dependent Claim
43 words
A process according to claim 1 wherein n is 2, X is the group --NR 2 R 3 and the respective groups R 2 and R 3 are alkyl groups and the total number of alkyl carbon atoms is from 20 to 70.
Claim 12
Dependent Claim
53 words
A process according to claim 1 wherein n is 2, Y is hydrogen, X is the group --OR 1 and the two respective groups R 1 are the same and are selected from the group consisting of mixed isomer isodecyl, single isomer nonyl, mixed isomer nonyl, 2-ethylhexyl, mixed isomer octyl, di-isobutylcarbinyl and tridecyl.
Claim 13
Dependent Claim
23 words
A process according to claim 1 wherein the aqueous strip solution is water or water which contains a reduced concentration of halide ion.
Claim 14
Dependent Claim
14 words
A process according to claim 6 wherein the substituted pyridine has the formula: ##STR13##
Claim 15
Dependent Claim
21 words
A process according to claim 12 in which R 1 is a mixture of octyl groups derived from mixed isomer iso-octanol.
Claim 16
Dependent Claim
15 words
A process as set forth in claim 6 in which R 1 is 2-ethyl hexyl.
Claim 17
Dependent Claim
15 words
A process as set forth in claim 12 in which R 1 is 3,5,5-trimethyl hexyl.
Claim 18
Dependent Claim
14 words
A process as set forth in claim 12 in which R 1 is diisobutylmethyl.
Claim 19
Dependent Claim
23 words
A process as set forth in claim 12 in which R 1 is a mixture of nonyl isomers derived from mixed isomer isononanol.
Claim 20
Dependent Claim
23 words
A process as set forth in claim 12 in which R 1 is a mixture of decyl isomers derived from mixed isomer isodecanol.
Claim 21
Dependent Claim
23 words
A process as set forth in claim 12 in which R 1 is a mixture of tridecyl isomers derived from mixed isomer tridecanol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |