Patent US3078146A successfully refreshed from Google Patents.
US3078146A
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Method of preparing aluminum sulfate from waste sulfate pickle liquor and aluminum ore
Assignee: North American Coal Corp
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Filing: 1960-05-27
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Granted: 1963-02-19
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Expires: 1980-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robert L Savage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/743; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF PREPARING SUBSTANTIALLY PURE ALUMINUM SULFATE WHICH COMPRISES TREATING WASTE PICKLE LIQUOR WITH AN OXYGEN-CONTAINING GAS TO OBTAIN A SOLUTION CONTAINING FERRIC SULFATE AND DIGESTING A NATURALLY OCCURRING ALUMINUM ORE WITH SAID SOLUTION IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE FROM ABOUT 100*C. TO 340*C. AND A PRESSURE FROM ABOUT ATMOSPHERIC TO 5,000 P.S.I., TO FORM A SOLUTION CONTAINING ALUMINUM SULFATE, FILTERING SAID SOLUTION AND TREATING THE FILTRATE WITH A REDUCING GAS AND HEAT IN THE PRESENCE OF CONCENTRATED SULFURIC ACID TO PRECIPITATE ANY RESIDUAL FERROUS SULFATE, FILTERING SAID FER-
Claim 2
Independent Claim
92 words
THE METHOD OF PREPARING SUBSTANTIALLY PURE ALUMINUM SULFATE WHICH COMPRISES TREATING WASTE PICKLE LIQUOR WITH AN OXYGEN-CONTAINING GAS TO OBTAIN A SOLUTION CONTAINING FERRIC SULFATE AND DIGESTING A NATURALLY OCCURRING ALUMINUM ORE WITH SAID SOLUTION IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE FROM ABOUT 100*C. TO 340*C. AND A PRESSURE FROM ABOUT ATMOSPHERIC TO 5,000 P.S.I., TO FORM A SOLUTION CONTAINING ALUMINUM SULFATE, FILTERING SAID SOLUTION AND TREATING THE FILTRATE WITH A REDUCING GAS AND HEAT IN THE PRESENCE OF CONCENTRATED SULFURIC ACID TO PRECIPITATE ANY RESIDUAL FERROUS SULFATE, FILTERING SAID FER-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |