US4576815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extraction of metal values and novel metal extractants
Assignee: Syngenta Ltd
•
Filing: 1983-10-12
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Granted: 1986-03-18
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Expires: 2003-10-12
Abstract
Abstract Metal values are extracted from aqueous solutions of metal salts containing halide or pseudo halide ions by pyrimidine, pyrazine or pyridazine derivatives bearing the substituent -(C=O.X)n where X is the group -OR1 or -NR2R3 and n is 1, 2 or 3. R1 is a hydrocarbyl group containing from 1 to 36 carbon atoms and R2 and R2 together contain from 1 to 36 carbon atoms. The molecule as a whole contains from 5 to 36 alkyl carbon atoms and may carry further optional substituents. The process is especially useful for the recovery of metals from leach solutions derived from sulphur-containing ores.
Inventors
- 👤 Frank Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:02
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/30; C01; C01G; C01G11/00; C01G11/003; C01G3/00; C01G3/003; C01G51/00; C01G51/01; C01G9/00; C01G9/003; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/24; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/24; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/36; C22B3/362; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A process for extracting metal values from aqueous solutions of metal salts containing halides or pseudo halide anions which comprises contacting the aqueous solution with a solution in a water-immiscible organic solvent of a substituted pyrimidine, pyrazine or pyridazine of formula: ##STR4## wherein X is the group --OR 1 or --NR 2 R 3 , R 1 being a hydrocarbyl group containing from 1 to 36 carbon atoms and R 2 and R 3 separately being hydrogen or a hydrocarbyl group, and R 2 and R 3 together containing from 1 to 36 carbon atoms; n is 1, 2 or 3; and Y represents one or more optionally substituted phenyl groups, provided that there is present in the molecule a total number of from 5 to 36 alkyl carbon atoms.
Claim 2
Dependent Claim
130 words
A process for extracting metal values from aqueous solutions of metal salts containing halides or pseudo halide anions which comprises contacting the aqueous solution with a solution in a water-immiscible organic solvent of a substituted pyrimidine, pyrazine or pyridazine of formula: ##STR4## wherein X is the group --OR 1 or --NR 2 R 3 , R 1 being a hydrocarbyl group containing from 1 to 36 carbon atoms and R 2 and R 3 separately being hydrogen or a hydrocarbyl group, and R 2 and R 3 together containing from 1 to 36 carbon atoms; n is 1, 2 or 3; and Y represents one or more optionally substituted phenyl groups, provided that there is present in the molecule a total number of from 5 to 36 alkyl carbon atoms.
Claim 3
Dependent Claim
44 words
A process according to claim 1 wherein Y represents a phenyl group having one or more substituents selected from the group consiting of a lower alkyl group, a lower alkoxy group, a carboxylic acid group, a carboxylic acid ester group and a halogen atom.
Claim 4
Dependent Claim
27 words
A process according to claim 1 or claim 2 wherein there is present in the molecule a total number of from 9 to 24 alkyl carbon atoms.
Claim 5
Dependent Claim
35 words
A process according to claim 1 or claim 2 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
48 words
A process according to claim 1 or 2 wherein n is 1 or 2, X is the group --OR 1 and R 1 is the group ##STR5## wherein R 4 and R 5 are alkyl groups and R 4 contains two fewer carbon atoms than R 5 .
Claim 7
Dependent Claim
30 words
A process according to claim 1 or claim 2 wherein n is 1, X is the group --OR 1 , and R 1 is isodecyl, tridecyl, 2-hexyldecyl, isooctadecyl or 3,9-diethyl-6-tridecyl.
Claim 8
Dependent Claim
41 words
A process according to claim 1 or claim 2 wherein there is employed a substituted pyrimidine; n is 1; the group --COX is located in the -5 position on the pyrimidine ring; and the group --Y is located in the -4position.
Claim 9
Dependent Claim
41 words
A process according to claim 1 wherein n is 1, X is the group --NR 2 R 3 , and R 2 and R 3 are alkyl groups which taken together contain a total of from 15 to 36 carbon atoms.
References Cited (Backward Citations)
US3086973A
Cited
EP0057797A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |