Patent US3839168A successfully refreshed from Google Patents.
US3839168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing high-purity nickel from nickel matte
Assignee: LE NICKEL FR
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Filing: 1972-05-24
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Granted: 1974-10-01
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Expires: 1992-05-24
Abstract
Abstract A method for producing high purity nickel from nickel matte comprising successively the following steps: comminuting and roasting said matte at a temperature near 900*C to obtain nickel oxide; dissolving this impure nickel oxide in concentrated hydrochloric acid; oxidating to the ferric state the iron which is contained in the impure solution resulting from the preceding step removing the impurities from this solution by means of ion exchange resin and eluting said impurities to recover cobalt; and subjecting said purified solution to an electrolysis to recover high-purity nickel.
Inventors
- 👤 L Gandon
- 👤 C Bozec
- 👤 P Lenoble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:02
CPC Classifications
C; C01; C01G; C01G53/00; C01G53/08; C01G53/09; C01G51/00; C01G51/01; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A METHOD FOR PRODUCING HIGH-PURITY NICKEL FROM IMPURE NICKEL MATTE CONTAINING COBALT AND OTHER IMPURITIES COMPRISING SUCCESSIVELY THE FOLLOWING STEPS: COMMINUTING THE ROASTING SAID IMPURE MATTE AT A TEMPERATURE OF ABOUT 900*C TO OBTAIN IMPURE NICKEL OXIDE; DISSOLVING THIS IMPURE NICKEL OXIDE IN CONCENTRACTED HYDROCLORIC ACID; OXIDIZING THE FERRIC STATE THE IRON WICH IS CONTAINED IN THE IMPURE SOLUTION RESULTING FROM THE PRECEDING STEP; REMOVING THE IMPURITIES FROM THIS SOLUTION BY MEANS OF A ION-EXCHANGE RESIN TO PRODUCE A PURIFIED NICKEL CHLORIDE SOLUTION; SELECTIVELY ELUTING SAID IMPURITIES TO RECOVER A COBALT CHLORIDE SOLUTION; AND SUBJECTING SAID PURIFIED NICKEL CHLORIDE SOLUTION TO AN ELECTROLYSIS TO RECOVER HIGH-PURITY NICKEL.
Claim 2
Independent Claim
107 words
A METHOD FOR PRODUCING HIGH-PURITY NICKEL FROM IMPURE NICKEL MATTE CONTAINING COBALT AND OTHER IMPURITIES COMPRISING SUCCESSIVELY THE FOLLOWING STEPS: COMMINUTING THE ROASTING SAID IMPURE MATTE AT A TEMPERATURE OF ABOUT 900*C TO OBTAIN IMPURE NICKEL OXIDE; DISSOLVING THIS IMPURE NICKEL OXIDE IN CONCENTRACTED HYDROCLORIC ACID; OXIDIZING THE FERRIC STATE THE IRON WICH IS CONTAINED IN THE IMPURE SOLUTION RESULTING FROM THE PRECEDING STEP; REMOVING THE IMPURITIES FROM THIS SOLUTION BY MEANS OF A ION-EXCHANGE RESIN TO PRODUCE A PURIFIED NICKEL CHLORIDE SOLUTION; SELECTIVELY ELUTING SAID IMPURITIES TO RECOVER A COBALT CHLORIDE SOLUTION; AND SUBJECTING SAID PURIFIED NICKEL CHLORIDE SOLUTION TO AN ELECTROLYSIS TO RECOVER HIGH-PURITY NICKEL.
Claim 3
Dependent Claim
32 words
A method as claimed in claim 1, wherein said impurities are eluted in a single step operation by means of approximately decinormal hydrochloric acid after rinsing the resin with concentrated hydrochloric acid.
Claim 4
Dependent Claim
46 words
A method as claimed in claim 2, wherein the first part of the solution resulting from said rinsing is added to said impure solution and the second part of the solution resulting from said rinsing is used for dissolving fresh amounts of said impure nickel oxide.
Claim 5
Dependent Claim
34 words
A method as claimed in claim 3, wherein said impurities are removed by means of two ion-exchange devices in series, said impure solution being introduced alternately into the first and the second ion-exchange device.
Claim 6
Dependent Claim
24 words
A method as claimed in claim 4, wherein the removing of said impurities is interrupted as soon as cobalt appears in said purified solution.
Claim 7
Dependent Claim
70 words
A method as claimed in claim 1, wherein the removing of said impurities is carried out by means of two ion-exchange devices in series, the elution of said impurities being carried out by approximately decinormal hydrochloric acid, the first one of said ion-exchange device being rinsed by hydrochloric acid about three times normal and the second one of said ion-exchange devices being rinsed by hydrochloric acid about eight times normal.
Claim 8
Dependent Claim
32 words
A method as claimed in claim 6, wherein the removing of said impurities is interrupted as soom as copper appears in the solution flowing from the first one of said ion-exchange devices.
Claim 9
Dependent Claim
24 words
A method as claimed in claim 7, wherein cobalt is recovered from the elution solution flowing from the second one of said ion-exchange devices.
Claim 10
Dependent Claim
37 words
A method as claimed in claim 1, wherein chlorine released during said electrolysis is recovered and brought to react with hydrogen, the hydrochloric acid thus produced being used for dissolving fresh amounts of said impure nickel oxide.
Claim 11
Dependent Claim
18 words
A method as claimed in claim 1, wherein the active radicals of said resin are quaternary ammonium radicals.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |