US3207575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treatment of salting out product to recover sodium aluminum fluoride and sulfuric acid
Assignee: Reynolds Metals Co
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Filing: 1962-03-27
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Granted: 1965-09-21
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Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Meriwether L Garing
- 👤 Jr Fredrick Earl Adkins
- 👤 George E Branigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:14
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/50; C01F7/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
METHOD FOR THE TREATMENT OF THE SALTING OUT PRODUCT RESULTING FROM THE EVAPORATION OF RECYCLED CAUSTIC LIQUOR IN THE EXTRACTION OF ALUMINOUS ORES, SAID SALTING OUT PRODUCT CONTAINING SODIUM, SULFATE AND FLUORINE VALUES, TO RECOVER SAID VALUES IN THE FORM OF SODIUM ALUMINUM FLUORIDE AND SULFURIC ACID, WHICH COMPRISES THE STEPS OF (A) DISSOLVING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA, ALUMINA HYDRATE, ALUMINUM SULFATE, AND METALLIC ALUMINUM IN AQUEOUS HYDROFLURIC ACID HAVING A CONCENTRATION OF HF BETWEEN ABOUT 35% AND ABOUT 50% BY WEIGHT; (B) FORMING AN AQUEOUS SOLUTION OF SAID SALTING OUT PRODUCT;
Claim 2
Dependent Claim
97 words
METHOD FOR THE TREATMENT OF THE SALTING OUT PRODUCT RESULTING FROM THE EVAPORATION OF RECYCLED CAUSTIC LIQUOR IN THE EXTRACTION OF ALUMINOUS ORES, SAID SALTING OUT PRODUCT CONTAINING SODIUM, SULFATE AND FLUORINE VALUES, TO RECOVER SAID VALUES IN THE FORM OF SODIUM ALUMINUM FLUORIDE AND SULFURIC ACID, WHICH COMPRISES THE STEPS OF (A) DISSOLVING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA, ALUMINA HYDRATE, ALUMINUM SULFATE, AND METALLIC ALUMINUM IN AQUEOUS HYDROFLURIC ACID HAVING A CONCENTRATION OF HF BETWEEN ABOUT 35% AND ABOUT 50% BY WEIGHT; (B) FORMING AN AQUEOUS SOLUTION OF SAID SALTING OUT PRODUCT;
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |