US3849269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing ores containing nickel and copper oxides
Assignee: Fried Krupp AG
•
Filing: 1973-09-18
•
Granted: 1974-11-19
•
Expires: 1993-09-18
Abstract
Abstract Ores containing nickel and copper oxides are initially reduced and then leached with aqueous ferric chloride. The resulting solution is oxidized to precipitate ferric hydroxide therefrom and is thereafter separated into its components from which cobalt and nickel are recovered by electrolysis. Alternatively, the resulting solution is oxidized in the presence of flaking agents which assist the nickel, copper and cobalt in adhering to precipitated ferric hydroxide, from which they are leached with an ammonium carbonate solution and separated by ion exchange or solvent extraction.
Inventors
- 👤 J Hartwig
- 👤 U Scheffler
- 👤 K Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:16
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/32; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415; C22B23/0423; C22B3/30; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A PROCESS FOR ISOLATING VALUABLE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF NICKEL, COPPER AND COBALT FROM OXIDIC ORE CONTAINING SUCH VALVES AND WHICH COMPRISES REDUCING THE ORE SO THAT THESE VALUES, BUT NOT ANY IRON CONTAINED IN THE ORE, ARE REDUCED TO THEIR FREE METAL STATE, LEACHING THE VALUABLE SUBSTANCE FROM THUS-REDUCED ORE AT NORMAL PRESSURE AND AT A TEMPERATURE BELOW 100*C WITH AQUEOUS FERRIC CHLORIDE AND OXIDIZING RESULTING ELUATE TO PRECIPITATE FERRIC HYDROXIDE THEREFROM.
Claim 2
Dependent Claim
76 words
A PROCESS FOR ISOLATING VALUABLE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF NICKEL, COPPER AND COBALT FROM OXIDIC ORE CONTAINING SUCH VALVES AND WHICH COMPRISES REDUCING THE ORE SO THAT THESE VALUES, BUT NOT ANY IRON CONTAINED IN THE ORE, ARE REDUCED TO THEIR FREE METAL STATE, LEACHING THE VALUABLE SUBSTANCE FROM THUS-REDUCED ORE AT NORMAL PRESSURE AND AT A TEMPERATURE BELOW 100*C WITH AQUEOUS FERRIC CHLORIDE AND OXIDIZING RESULTING ELUATE TO PRECIPITATE FERRIC HYDROXIDE THEREFROM.
Claim 3
Dependent Claim
26 words
A process according to claim 1 which further comprises separating thus-precipitated ferric hydroxide from the oxidized eluate and isolating the valuable substance from the resulting solution.
Claim 4
Dependent Claim
15 words
A process according to claim 2 wherein the isolating comprises solvent extracting followed by electrolysis.
Claim 5
Dependent Claim
21 words
A process according to claim 3 wherein ferric chloride is obtained from the solvent extracting and is employed in the leaching.
Claim 6
Dependent Claim
43 words
A process according to claim 3 wherein the electrolyte is hydrochloric acid, the process further comprising reacting dEpleted hydrochloric acid electrolyte from the electrolysis with part of the ferric hydroxide precipitate to form ferric chloride and using thus-formed ferric chloride in the leaching.
Claim 7
Dependent Claim
30 words
A process according to claim 1 which comprises adding a flaking agent to the eluate, while oxidizing the latter, to bind ions of the valuable substance to precipitating ferric hydroxide.
Claim 8
Dependent Claim
25 words
A process according to claim 6 which further comprises dissolving in an aqueous ammonium carbonate solution the valuable substance bound to the precipitated ferric hydroxide.
Claim 9
Dependent Claim
22 words
A process according to claim 7 which further comprises isolating individual components of the valuable substance from the resulting ammonium carbonate solution.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |