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US4175012A
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β-Diketones and the use thereof as metal extractants
Assignee: Henkel Corp
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Filing: 1975-12-15
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Granted: 1979-11-20
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Expires: 1995-12-15
Abstract
Abstract New β-diketones of the structure ##STR1## where R is phenyl or alkyl substituted phenyl, R' is alkyl, alkyl substituted phenyl or chloro substituted phenyl and R" is H or --CN with the provisos that; (1) when R is phenyl, R' is a branched chain alkyl group of at least seven carbon atoms and (2) when R is alkyl substituted phenyl, the number of carbon atoms in the alkyl substituent or substituents is at least 7 and at least one such alkyl substituent is branched chain. Process of recovering copper and nickel from their aqueous solutions by the use of the new β-diketones.
Inventors
- 👤 Kenneth D. MacKay
- 👤 Edgar R. Rogier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:02
CPC Classifications
C; C07; C07C; C07C255/00; C07C49/00; C07C49/92; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/306; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
144 words
The process of extracting divalent metal values selected from copper and nickel from aqueous solutions thereof which comprises contacting the said aqueous solutions with a β-diketone or a solution thereof in an organic hydrocarbon solvent having a boiling point of at least about 150° C. to extract at least a portion of the copper or nickel values in the organic phase, said β-diketone having the structure: ##STR15## where R is phenyl or alkyl substituted phenyl, R' is alkyl, alkyl substituted phenyl or chloro substituted phenyl and R" is H with the provisos that: (1) when R is phenyl, R' is a branched chain alkyl group of at least seven carbon atoms and (2) when R is alkyl substituted phenyl, the number of carbon atoms in the alkyl substituent or substituents is at least 7 and at least one such alkyl substituent is branched chain.
Claim 2
Dependent Claim
144 words
The process of extracting divalent metal values selected from copper and nickel from aqueous solutions thereof which comprises contacting the said aqueous solutions with a β-diketone or a solution thereof in an organic hydrocarbon solvent having a boiling point of at least about 150° C. to extract at least a portion of the copper or nickel values in the organic phase, said β-diketone having the structure: ##STR15## where R is phenyl or alkyl substituted phenyl, R' is alkyl, alkyl substituted phenyl or chloro substituted phenyl and R" is H with the provisos that: (1) when R is phenyl, R' is a branched chain alkyl group of at least seven carbon atoms and (2) when R is alkyl substituted phenyl, the number of carbon atoms in the alkyl substituent or substituents is at least 7 and at least one such alkyl substituent is branched chain.
Claim 3
Dependent Claim
37 words
The process of claim 1 wherein the organic phase is separated from the aqueous solution and then at least a portion of the copper or nickel values is stripped therefrom by contacting same with a stripping medium.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein the stripping medium is aqueous sulfuric acid.
Claim 5
Dependent Claim
15 words
The process of claim 2 wherein the stripping medium is an aqueous ammonia containing solution.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein the copper or nickel containing aqueous solution is an ammoniacal solution.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein the β-diketone is present in the organic solvent in an amount of about 2 to 50% by weight.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein the β-diketone is present in the organic solvent in an amount of about 2 to 40% by weight.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the β-diketone is present in the organic solvent in an amount of about 2 to 15% by weight.
Claim 10
Dependent Claim
11 words
The process of claim 1 wherein the organic solvent is kerosene.
Claim 11
Dependent Claim
31 words
The process of claim 1 wherein the metal containing aqueous solution and the β-diketone or the organic solvent solution thereof are contacted in a phase ratio of about 5:1 to 1:5.
Claim 12
Dependent Claim
94 words
The process of claim 1 wherein the metal is copper, the aqueous solution is ammoniacal, the β-diketone is present in an amount of about 2 to 40% by weight in the organic solvent, the organic solvent is kerosene, the organic solvent solution:aqueous phase ratio is in the range of 5:1 to 1:1, the phases are separated, the loaded organic phase is stripped by contacting the same with an aqueous sulfuric acid stripping solution, the stripped organic phase is separated from the stripping solution and copper metal is recovered from the stripping solution by electrolysis.
Claim 13
Dependent Claim
11 words
The process of claim 1 wherein R is alkyl substituted phenyl.
Claim 14
Dependent Claim
11 words
The process of claim 10 wherein R is monoalkyl substituted phenyl.
Claim 15
Dependent Claim
15 words
The process of claim 11 wherein the alkyl group contains at least nine carbon atoms.
Claim 16
Dependent Claim
9 words
The process of claim 10 wherein R' is alkyl.
Claim 17
Dependent Claim
11 words
The process of claim 12 wherein R' is alkyl substituted phenyl.
Claim 18
Dependent Claim
9 words
The process of claim 12 wherein R' is chlorophenyl.
Claim 19
Dependent Claim
9 words
The process of claim 12 wherein R" is H.
Claim 20
Dependent Claim
9 words
The process of claim 1 wherein R is phenyl.
Claim 21
Dependent Claim
14 words
The process of claim 19 wherein R' contains less than about 20 carbon atoms.
Claim 22
Dependent Claim
28 words
The process of claim 1 wherein the β-diketone has the structure ##STR16## where R"" is a branched chain dodecyl group and R""' is a branched chain heptyl group.
Claim 23
Dependent Claim
17 words
The process of claim 1 wherein R is phenyl and R' is a branched chain heptyl group.
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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |