Coal liquefaction solids removal
Abstract
Abstract THE CLARIFIED EXTRACT ISSUED FROM A SOLIDS-LIQUIDS SEPARATION ZONE (IN WHICH THE SOLIDS ARE SEPARATED FROM THE LIQUIDS OF A COAL LIQUEFACTION PRODUCT ACCORDING TO THE SIZE OF THE SOLIDS AND CONCENTRATED IN A SEPARATELY DISCHARGED SOLIDS SLURRY) IS IMPROVED BY ADDING TO THE COAL LIQUEFACTION PRODUCT A RECYCLE STREAM SELECTED FROM A FIRST FRACTION, BOILING WITHIN THE RANGE FROM ABOUT 100*F. TO ABOUT 700*F. AND RECOVERED FROM EITHER THE CLARIFIED EXTRACT OR THE CONCENTRATED SOLIDS SLURRY ISSUED FROM THE SEPARATION ZONE, AND A SECOND FRACTION, BOILING ABOVE ABOUT 1000*F. AND CONTAINING ASH SOLIDS RECOVERED FROM THE CLARIFIED EXTRACT. THE RECYCLE STREAM IS ADDED IN AMOUNTS OF FROM ABOUT 1 TO ABOUT 50 WEIGHT PERCENT OF THE FEED TO THE SEPARATION ZONE. IT HAS BEEN FOUND THAT EACH OF THESE FRACTIONS QUITE UNEXPECTEDLY ACTS AS AN AGGLOMERATING AGENT FOR PARTICULATE SOLIDS IN THE LIQUEFACTION PRODUCT, INCREASING THE SIZES OF THE PARTICLES TO SEPARABLE SIZED, THEREBY PROVIDING AN INCREASE IN THE CLARITY OF THE COAL EXTRACT ISSUING FROM THE SEPARATION ZONE.
Inventors
- 👤 Robert J Fiocco
- 👤 Edward L Wilson
Bibliographic Details
Claims Analysis
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| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
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