US3650688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial process for separation of nickel
Assignee: Femipari Kutato Intezet
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Filing: 1969-10-17
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Granted: 1972-03-21
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Expires: 1989-10-17
Abstract
Abstract Nickel can be separated from metals forming chlorocomplex anions, such as cobalt, by dissolving a nickel concentrate in hydrochloric acid, boiling down the nickel chloride solution to a nickel content of not more than 240 grams per liter, increasing the concentration of hydrochloric acid to 7 to 9 moles/liter by adding concentrated sulfuric acid to the solution in an amount equivalent to the nickel present, thereby forming a nickel sulfate salt, adsorbing the metallic contaminations on an anion exchange resin, and isolating hydrated nickel sulfate and hydrochloric acid from the effluent from the resin.
Inventors
- 👤 Laszlo Fekete
- 👤 Imre Pataricza
- 👤 Dezso Bodi
- 👤 Jozsef Gyuricza
- 👤 Mihaly Miskei
- 👤 Ferenc Orszag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:17
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A process as claimed in claim 1, and preparing said nickel chloride solution by dissolving the nickel concentrate in a waste acid of technical quality containing not more than 20 percent of hydrochloric acid, and distilling off concentrated hydrochloric acid solution from the nickel-containing solution purified by ion exchange.
Claim 2
Dependent Claim
17 words
A process as claimed in claim 1, said content being not more than 200 grams per liter.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |