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:
Sep. 27, 1977
Filed:
May. 17, 1976
Karl W Plumlee, Baytown, TX (US);
Lonnie W Vernon, Baytown, TX (US);
Exxon Research & Engineering Co., Linden, NJ (US);
Abstract
A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products by steps which include: (a) contacting, in a liquefaction zone, said coal feed with a hydrogen donor solvent at temperature and pressure sufficient to hydroconvert and liquefy the coal, (b) separating the product from the liquefaction zone by distillation into fractions inclusive of a liquid solvent fraction which contains at least 30 weight percent, and preferably at least 50 weight percent hydrogen donor compounds, particularly those fractions boiling within about the 350.degree.-850.degree. F. range, and preferably within about the 400.degree.-700.degree. F. range, (c) hydrotreating said liquid solvent fraction in a hydrogenation zone in the presence of a quinone catalyst, and (d) recycling the hydrogenated liquid solvent mixture to said coal liquefaction zone.