US3794719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of nickel contamination by zinc in {60 -hydroxy oxime extract
Assignee: SEC Corp
•
Filing: 1972-02-25
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Granted: 1974-02-26
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Expires: 1992-02-25
Abstract
Abstract The amount of zinc coextracted with nickel by Alpha -hydroxy oxime extractants is reduced by contacting said extractants with an excess of nickel ions to selectively displace zinc.
Inventors
- 👤 R Eliasen
- 👤 E Lowenhaupt
- 👤 E Edmunds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:08
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/30; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0446; B01D11/0457; C01; C01G; C01G53/00; C01G53/01; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
The process of claim 1 wherein after contacting the said extractant with an excess of nickel ions the extractant prior to the stripping operation is washed with an acidic wash solution.
Claim 2
Dependent Claim
27 words
A process according to claim 1 wherein the excess of nickel ions is recycled in a closed circuit to prevent loss of the excess of nickel ions.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |