US3397130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manganese recovery from leach solutions
Assignee: United States Department of the Interior
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Filing: 1965-10-20
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Granted: 1968-08-13
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Francis E Brantley
- 👤 Rampacek Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:08
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/10; C22; C22B; C22B47/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A PROCESS FOR SEPARATING IRON AND MANGANESE COMPOUNDS FROM PREGNANT LEACH LIQUOR RESULTING FROM LEACHING MANGANIFEROUS ORES WITH A LEACH SOLUTION CONTAINING FERROUS SULFATE, SULFURIC ACID AND AMMONIUM SULFATE WHICH COMPRISES HEATING SAID LIQUOR TO AT LEAST 200*C., IN THE PRESENCE OF AN OXIDIZING AGENT, UNDER A PRESSURE OF ABOUT SATURATED STEAM PRESSURE AT THE TEMPERATURE TO WHICH SAID LIQUOR HA BEEN HEATED, MAINTAINING SAID TEMPERATURE AND PRESSURE FOR A PERIOD OF TIME SUFFICIENT TO ALLOW THE PRECIPITATION OF FERRIC OXIDE AND A MANGANESE-AMMONIUM COMPLEX, (NH4)2MN2(SO4)3, AND SEPARATING SAID PRECIPITATE FROM REMAINING LIQUOR WHILE SAID REMAINING LIQUOR IS MAINTAINED AT THE PRECIPITATION TEMPERATURE AND PRESSURE.
Claim 2
Dependent Claim
13 words
THE PROCESS OF CLAIM 3 WHEREIN SAID PRECIPITATION TEMPERATURE IS AT LEATS 250*C.
Claim 3
Dependent Claim
40 words
THE PROCESS OF CLAIM 4 WHEREIN SAID PRECIPITATE IS SEPARATED FROM SAID LIQUOR BY FILTRATION, SAID SEPARATED PRCIPITATE IS WASHED WITH WATER TO DISSOLVE SAID COMPLEX THEREIN, AND RESULTANT WASH WATER CONTAINING SAID COMPLEX IS SEPARATED FROM FERRIC OXIDE PRECIPITATE.
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |