Recovery of tar from tar sands
Abstract
Abstract SEPARATING TAR FROM TAR SAND IN A PROCESS INCLUDING MIXING TAR SAND WITH A HYDROCARBON SOLVENT TO PRODUCE A MIXED PHASE SYSTEM INCLUDING A HYDROCARBON PHASE AND A SOLID PHASE, INTRODUCING THE MIXTURE INTO A FLOWING AQUEOUS STREAM UNDER SUCH CONDITIONS THAT THE HYDROCARBON PHASE HAS A MAXIMUM VISCOSITY OF TWO POISES, THAT THE DIFFERENTIAL VELOCITY BETWEEN EACH PARTICLE OF SAND AND THE FLOWING AQUEOUS STREAM PRODUCES A REYNOLDS NUMBER OF AT LEAST 150 IN THE SYSTEM INCLUDING THE PARTICLE OF SAND AND THE SURROUNDING AQUEOUS PHASE, AND THAT THE VOLUME RATIO OF AQUEOUS PHASE TO TAR SAND, EXCLUSIVE OF SOLVENT, IS AT LEAST FOUR, AND SEPARATELY RECOVERING SOLID PHASE, AQUEOUS PHASE, AND HYDROCARBON PHASE.
Inventors
- 👤 Elmond Lowell Claridge
- 👤 John Treanor Smith
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |