Title: Treatment of coal liquefaction effluent

Abstract: A solvent extraction coal conversion process is provided wherein the effluent slurry product is subjected to vacuum distillation to yield distillate and extrudable still bottoms. The latter are removed from the vacuum still by means of an extrusion screw which is operatively associated with the still.

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Inventors: Burke, Francis P. (Bethel Park, PA, US)

Application Number: 861912
Filing Date: 1977-12-19
Publication_date: 1979-03-27
Assignee: Continental Oil Company (Stamford, CT)
Primary Class(es): 208/409 44/636, 196/102, 196/114, 196/115, 196/133, 208/349, 208/419, 264/87
Other Classes:
US Patent Ref:

2060447	Nov, 1936	Schoenemann	208/45.
2489700	Nov, 1949	Coast	208/45.
2768128	Oct, 1956	Brown	208/349.
3808119	Apr, 1974	Bull et al.	208/8.

Other Refs:
Primary Examiner: Levine, Herbert
Assistant Examiner:
Attorney: Scott; F. Lindsey, Fowler, Jr.; D. Leigh, Mikesell, Jr.; William A.