US3656940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of nickel containing solutions
Assignee: Societe Le Nickel SLN SA
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Filing: 1969-06-05
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Granted: 1972-04-18
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Expires: 1989-06-05
Abstract
Abstract Aqueous solutions containing nickel can be purified of metals capable of forming anionic complex chlorides, particularly, iron and cobalt, by raising the chloride content of the solution to from 2N to 6N by adding a completely dissociated salt of hydrochloric acid followed by contacting the solution with an anion exchange resin at a temperature above 20* C. The process is particularly suitable for purifying the anolyte from an electrolytic process for the purification of ferro-nickel or nickel matte, the purified nickel containing solution being recycled to form the catholyte.
Inventors
- 👤 Louis Gandon
- 👤 Roger Jean
- 👤 Philippe Lenoble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:36
CPC Classifications
C; C01; C01G; C01G53/00; C01G53/01; B; B01; B01J; B01J41/00; B01J41/04; C01G49/00; C01G49/0009; C01G51/00; C01G51/01; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
A process as claimed in claim 1 wherein said at least one impurity is subsequently eluted from said anion exchange resin with an eluant selected from the group consisting of water, acidulated water and aqueous solutions of alkali and alkaline earth metal chlorides at such a concentration that the said metal is removed from said anion exchange resin.
Claim 2
Dependent Claim
20 words
A process as claimed in claim 1 wherein said anion exchange resin has active groups of the quaternary ammonium type.
Claim 3
Dependent Claim
13 words
A process as claimed in claim 1, wherein said chloride is sodium chloride.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1, wherein said chloride is potassium chloride.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1, wherein said chloride concentration is in the range from about 3 to 4N.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |