US3954936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-nitrosophenols as extractants for metal values
Assignee: EIDP Inc
•
Filing: 1973-01-29
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Granted: 1976-05-04
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Expires: 1993-01-29
Abstract
Abstract O-Nitrosophenols adapted for the liquid-liquid extraction of metals, e.g., copper, from aqueous solutions and a nitrosation process for the preparation of the phenols.
Inventors
- 👤 Raymond John Shozda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/003; C01G45/00; C01G45/01; C01G53/00; C01G53/01; C07; C07C; C07C207/00; C07C207/04; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/262; C01P; C01P2006/00; C01P2006/80; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A process for recovering at least one metal value selected from the group consisting of copper, cobalt, manganese and nickel from an aqueous solution while rejecting iron comprising contacting said aqueous solution at acid pH with an organic phase comprising a liquid, substantially water-immiscible, organic solvent and a substituted 6-chloro orthonitrosophenol wherein the substituent groups on said phenol contain 6-20 carbon atoms to extract at least a portion of the metal values in said aqueous solution and thereafter separating the organic phase from the aqueous phase and recovering metal values from the organic phase.
Claim 2
Dependent Claim
94 words
A process for recovering at least one metal value selected from the group consisting of copper, cobalt, manganese and nickel from an aqueous solution while rejecting iron comprising contacting said aqueous solution at acid pH with an organic phase comprising a liquid, substantially water-immiscible, organic solvent and a substituted 6-chloro orthonitrosophenol wherein the substituent groups on said phenol contain 6-20 carbon atoms to extract at least a portion of the metal values in said aqueous solution and thereafter separating the organic phase from the aqueous phase and recovering metal values from the organic phase.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein said orthonitrosophenol has the formula ##SPC4## wherein R 6 is an alkyl group having 8-12 carbon atoms.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein said metal values consist essentially of copper in the form of the cupric ion.
References Cited (Backward Citations)
US3428449A
Cited
US3770834A
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US3655347A
Cited
US3637711A
Cited
FR2091794A5
Cited
US3848002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |