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US4166837A
Expired / Lapsed
US
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Solvent-extraction process for recovery and separation of metal values
Assignee: King Industries Inc
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Filing: 1978-03-31
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Granted: 1979-09-04
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Expires: 1998-03-31
Abstract
Abstract The metal value separation efficiencies of alkyl aromatic sulfonic acid in solvent-extraction processes are enhanced by the addition to the solvent-extractant of a fused ring aromatic N-alkyl triazole and, optionally, an aliphatic alpha -hydroxy oxime. Especially important applications for the improved solvent-extractant are in the separation and recovery of copper from iron, cobalt from nickel, copper from cobalt, cobalt from zinc, nickel from zinc, zinc from iron, nickel from iron, copper from nickel, copper from iron and copper fron zinc.
Inventors
- 👤 Lawrence V. Gallacher
- 👤 Rachelle M. Rydzik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:43
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/40; C22B3/406; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
184 words
A process for recovering a first cationic metal value from an aqueous solution comprising a pair of said first cationic metal value and a second cationic metal value, said pair being selected from the group consisting of copper (II) and iron, cobalt (II) and nickel, copper (II) and cobalt (II), cobalt (II) and zinc, nickel and zinc, zinc and iron, nickel and iron, copper (II) and nickel, copper (II) and iron, and copper (II) and zinc, said process comprising contacting said aqueous solution at a pH of below 3.5 with a solvent extractant consisting of (i) an alkyl aromatic sulfonic acid having a molecular weight of at least about 400, (ii) a fuzed ring aromatic N-alkyl triazole and (iii) a water-immiscible solvent for (i) and (ii) and metal complexes thereof to provide a solution of said metal-value in said solvent-extractant, the mole % of (ii) in the combined (i) and (ii) being in the range of 10 to 95; separating the solution thus formed from the aqueous raffinate depleted in said first metal value; and recovering said first metal value from said separated solution.
Claim 2
Dependent Claim
184 words
A process for recovering a first cationic metal value from an aqueous solution comprising a pair of said first cationic metal value and a second cationic metal value, said pair being selected from the group consisting of copper (II) and iron, cobalt (II) and nickel, copper (II) and cobalt (II), cobalt (II) and zinc, nickel and zinc, zinc and iron, nickel and iron, copper (II) and nickel, copper (II) and iron, and copper (II) and zinc, said process comprising contacting said aqueous solution at a pH of below 3.5 with a solvent extractant consisting of (i) an alkyl aromatic sulfonic acid having a molecular weight of at least about 400, (ii) a fuzed ring aromatic N-alkyl triazole and (iii) a water-immiscible solvent for (i) and (ii) and metal complexes thereof to provide a solution of said metal-value in said solvent-extractant, the mole % of (ii) in the combined (i) and (ii) being in the range of 10 to 95; separating the solution thus formed from the aqueous raffinate depleted in said first metal value; and recovering said first metal value from said separated solution.
Claim 3
Dependent Claim
20 words
A process as defined in claim 1 wherein said alkyl aromatic sulfonic acid (i) is a polyalkyl aromatic sulfonic acid.
Claim 4
Dependent Claim
15 words
A process as defined in claim 2 wherein said sulfonic acid is dinonylnaphthalene sulfonic acid.
Claim 5
Dependent Claim
15 words
A process as defined in claim 2 wherein said sulfonic acid is didodecylnaphthalene sulfonic acid.
Claim 6
Dependent Claim
17 words
A process as defined in claim 1 wherein said fuzed ring aromatic N-alkyl triazole (ii) is N-nonylbenzotriazole.
Claim 7
Dependent Claim
16 words
A process as defined in claim 1 wherein said fuzed ring aromatic N-alkyltriazole (ii) is N-dodecylbenzotriazole.
Claim 8
Dependent Claim
21 words
A process as defined in claim 1 wherein said first metal value is recovered from said separated solution by acid stripping.
Claim 9
Dependent Claim
16 words
A process as defined in claim 1 wherein said metal pair comprises copper (II) and iron.
Claim 10
Dependent Claim
78 words
A process as defined in claim 1 wherein said solvent-extractant also includes (iv) an aliphatic α-hydroxy oxime of the formula ##STR4## wherein R and R' are aliphatic hydrocarbon radicals and R" is hydrogen or an aliphatic hydrocarbon radical, the mole % of (i) in the combined (i) and (iv) being in the range of 10 to 95, and the mole % of (ii) in the combined (i), (ii) and (iv) being in the range of 10 to 95.
Claim 11
Dependent Claim
14 words
A process as defined in claim 9 wherein said aliphatic α-hydroxyoxime comprises 5,8-diethyl-7-hydroxydodecan-6-one oxime.
Claim 12
Dependent Claim
16 words
A process as defined in claim 9 wherein said metal pair comprises cobalt (II) and nickel.
Claim 13
Dependent Claim
16 words
A process as defined in claim 9 wherein said metal pair comprises copper (II) and cobalt.
Claim 14
Dependent Claim
16 words
A process as defined in claim 9 wherein said metal pair comprises cobalt (II) and zinc.
Claim 15
Dependent Claim
15 words
A process as defined in claim 9 wherein said metal pair comprises nickel and zinc.
Claim 16
Dependent Claim
15 words
A process as defined in claim 9 wherein said metal pair comprises zinc and iron.
Claim 17
Dependent Claim
15 words
A process as defined in claim 9 wherein said metal pair comrises nickel and iron.
Claim 18
Dependent Claim
16 words
A process as defined in claim 9 wherein said metal pair comprises copper (II) and nickel.
Claim 19
Dependent Claim
16 words
A process as defined in claim 9 wherein said metal pair comprises copper (II) and iron.
Claim 20
Dependent Claim
16 words
A process as defined in claim 9 wherein said metal pair comprises copper (II) and zinc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |