The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1982
Filed:
Feb. 05, 1980
Shirley C Tsai, Pittsburgh, PA (US);
Howard G McIlvried, III, Pittsburgh, PA (US);
Gulf Research & Development Company, Pittsburgh, PA (US);
Abstract
Ash-containing raw coal is converted to a liquid fuel product by contacting the coal with hydrogen and an OHP-enriched solvent containing OHP and THP in a ratio of OHP/THP greater than 0.4, wherein the OHP is present in an amount of at least 5 weight percent of the solvent, to produce a liquid stream and a coal minerals stream, and recycling at least a portion of the coal minerals stream. A portion of the liquid stream (64) is catalytically hydrogenated (68), preferably with a tungsten-containing catalyst, to increase the ratio of OHP/THP to a value greater than 0.4 or preferably greater than l. The OHP-enriched liquid stream solvent is passed as solvent to a mixing zone (11) where it is admixed with raw coal (10) and recycled coal minerals (38), admixed with hydrogen (58) and passed to a preheater (20) and dissolver (24). The use of the OHP-enriched solvent improves coal solvation and liquid distillate production, while the recycle of coal minerals assists in maintaining a high OHP level in the circulated process solvent. By increasing the OHP/THP ratio to a value greater than 1, the amount of hydrogen consumed in the process can be significantly reduced.