Patent US2992894A successfully refreshed from Google Patents.
US2992894A
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Process for concentrating copper and zinc values present in aqueous solution
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1957-10-01
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Granted: 1961-07-18
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Expires: 1977-10-01
Abstract
No abstract record available.
Inventors
- 👤 Wayne C Hazen
- 👤 Angus V Henrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:22
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/384; C22B3/3846; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR CONCENTRATING BY SOLVENT EXTRACTION DIVALENT CATIONS OF COPPER AND ZINC PRESENT IN AN AQUEOUS ACIDIC SOLUTION COMPRISING CONTACTING AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE DIVALENT METAL CATION SELECTED FROM THE CLASS CONSISTING OF THE DIVALENT CATIONS OF COPPER AND ZINC WITH A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SELECTIVE SOLVENT COMPRISING AN ORGANIC HYDROGEN PHOSPHATE HAVING AT LEAST ONE AND NOT MORE THAN TWO HYDROGENS OF THE PHOSPHORIC ACID REPLACED WITH AN ALKYL RADICAL CONTAINING ABOUT 6-16, INCLUSIVE, CARBON ATOMS, THE PH OF THE AQUEOUS SOLUTION BEING SUCH THAT THE DISTRIBUTION COEFFICIENT FOR THE CATION TO BE EXTRACTED IS AT LEAST ONE AND LESS THAN THAT PH VALUE AT WHICH A PRECIPITATE OF THE METALLIC HYDROXIDE IS FORMED, AND SEPARATING THE RESULTING METAL CATION-LOADED SELECTIVE SOLVENT FROM THE EXTRACTED AQUEOUS SOLUTION.
Claim 2
Dependent Claim
132 words
A PROCESS FOR CONCENTRATING BY SOLVENT EXTRACTION DIVALENT CATIONS OF COPPER AND ZINC PRESENT IN AN AQUEOUS ACIDIC SOLUTION COMPRISING CONTACTING AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE DIVALENT METAL CATION SELECTED FROM THE CLASS CONSISTING OF THE DIVALENT CATIONS OF COPPER AND ZINC WITH A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SELECTIVE SOLVENT COMPRISING AN ORGANIC HYDROGEN PHOSPHATE HAVING AT LEAST ONE AND NOT MORE THAN TWO HYDROGENS OF THE PHOSPHORIC ACID REPLACED WITH AN ALKYL RADICAL CONTAINING ABOUT 6-16, INCLUSIVE, CARBON ATOMS, THE PH OF THE AQUEOUS SOLUTION BEING SUCH THAT THE DISTRIBUTION COEFFICIENT FOR THE CATION TO BE EXTRACTED IS AT LEAST ONE AND LESS THAN THAT PH VALUE AT WHICH A PRECIPITATE OF THE METALLIC HYDROXIDE IS FORMED, AND SEPARATING THE RESULTING METAL CATION-LOADED SELECTIVE SOLVENT FROM THE EXTRACTED AQUEOUS SOLUTION.
References Cited (Backward Citations)
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US2902454A
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US2743170A
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US2859092A
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |