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:
Feb. 02, 1982
Filed:
Aug. 25, 1980
Lavanga R Veluswamy, Houston, TX (US);
Peter S Maa, Baytown, TX (US);
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
Coal or similar liquefiable carbonaceous solids are converted into lower molecular weight liquids by contacting the feed solids with molecular hydrogen in the absence of externally added hydrocarbon liquids under liquefaction conditions during sequential residence in two or more liquefaction zones arranged in series and operated such that the temperature in each zone increases from the first to the final zone. The effluent from each liquefaction zone is passed to the next succeeding higher temperature zone in the series. No hydrocarbon liquids are added to the first zone in the series and the only liquids present in each succeeding zone of the series are the liquids in the effluent from the preceding zone. Liquid hydrocarbonaceous products are recovered from the effluent withdrawn from the last zone.