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Patent US3953200A successfully refreshed from Google Patents.
US3953200A
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Nickel extraction process
Assignee: Ethyl Corp
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Filing: 1975-03-27
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Granted: 1976-04-27
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Expires: 1995-03-27
Abstract
Abstract A process for extracting nickel from a low-grade nickel complex ore. The process features simultaneously grinding and leaching of the ore with an aqueous ammoniacal leach solution.
Inventors
- 👤 Suk Joong Im
- 👤 James D. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0446; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/15
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A process for recovering an increased quantity of nickel values from a low-grade complex nickel ore said process comprising simultaneously grinding and leaching with an aqueous ammonia and ammonium salt solution of a comminuted low-grade nickel ore characterized by having a nickel content of not more than about 0.5 percent by weight and a sulfur to nickel ratio of one or less for a time sufficient to form a resultant aqueous solution of nickel values.
Claim 2
Dependent Claim
75 words
A process for recovering an increased quantity of nickel values from a low-grade complex nickel ore said process comprising simultaneously grinding and leaching with an aqueous ammonia and ammonium salt solution of a comminuted low-grade nickel ore characterized by having a nickel content of not more than about 0.5 percent by weight and a sulfur to nickel ratio of one or less for a time sufficient to form a resultant aqueous solution of nickel values.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein said ore is preground to a size of from about 35 to about 14 mesh before being simultaneously ground and leached.
Claim 4
Dependent Claim
26 words
The process of claim 2 wherein said ore is ground, during simultaneous grinding and leaching, from about 35 to about 14 mesh to about 200 mesh.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said aqueous ammoniacal leach solution contains ammonia and ammonium salt.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein said leach solution additionally contains sulfite ions.
Claim 7
Dependent Claim
17 words
The process of claim 5 wherein said leach solution contains at least about 5 grams/liter of sulfite.
Claim 8
Dependent Claim
13 words
The process of claim 4 wherein said leach solution additionally contains carbonate ions.
Claim 9
Dependent Claim
17 words
The process of claim 7 wherein said leach solution contains at least about 5 grams/liter of carbonate.
Claim 10
Dependent Claim
14 words
The process of claim 4 wherein said leach solution additionally contains a halide ion.
Claim 11
Dependent Claim
21 words
The process of claim 4 wherein said ammonium salt is selected from ammonium carbonate, ammonium sulfite, ammonium sulfate or ammonium halide.
References Cited (Backward Citations)
US709277A
Cited
US1071791A
Cited
US1103346A
Cited
US1352832A
Cited
US2368194A
Cited
US3860689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |