Waste treatment of aluminum containing solutions
Abstract
Abstract THE YIELD OF DRY SOLID CONTENT OF SLUDGE IS GREATLY INCREASED IN PROPORTION TO THE QUANTITY OF FLOCCULENT MATERIAL BY TAKING OFF DISSOLVED ALUMINUM CONTAINING WASH WATER SOLUTIONS FROM AN ALUMINUM PROCESSING LINE, RECONDITIONING AND RETURNING THE SOLUTIONS AS AQUEOUS WASH SOLUTIONS TO THE LINE AND REUSING THEM IN THE LINE, AND TREATING AND NEUTRALIZING THE TAKEN OFF SOLUTIONS TO SETTLE AND PERIODICALLY REMOVE SLUDGE THEREFROM. THE ECONOMY OF THE OPERATION AND YIELD OF THE DRY SOLIDS CONTENT IN THE THE SLUDGE IS FURTHER ENHANCED BY PROVIDING A RELATIVELY LOW ACID PH BEFORE NEUTRALIZATION OF ALKALINE WASTE, BY COMBINING ACID AND CAUSTIC SOLUTIONS FOR TREATMENT, AND BY THE APPLICATION OF HEAT.
Inventors
- 👤 L Lancy
Bibliographic Details
Claims Analysis
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |