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:
Nov. 27, 1984
Filed:
Apr. 07, 1983
Peter S Maa, Baytown, TX (US);
Lavanga R Veluswamy, Houston, TX (US);
Lonnie W Vernon, Baytown, TX (US);
Exxon Research and Engineering Co., Florham Park, NJ (US);
Abstract
An improved liquefaction process for solid carbonaceous materials wherein at least a portion of the liquefaction is accomplished in the presence of an added hydrogenation catalyst and a solvent containing at least 1.25 wt % donatable hydrogen and in the presence of partially liquefied, solid carbonaceous material at liquefaction conditions. In a preferred embodiment, the liquefaction is accomplished in a plurality of stages and a solvent containing at least 1.25 wt % donatable hydrogen is used in at least one stage, most preferably in the second stage. The partially liquefied solid carbonaceous material may be taken from the bottoms fraction of the effluent from any of the liquefaction stages.