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. 13, 1977
Filed:
Jul. 23, 1976
Robert C Green, Berkeley Heights, NJ (US);
Robert L Dubell, Florham Park, NJ (US);
Exxon Research and Engineering Company, Linden, NJ (US);
Abstract
In a coal liquefaction process wherein feed coal is contacted with molecular hydrogen and a hydrogen-donor solvent in a liquefaction zone to form coal liquids and vapors and coal liquids in the solvent boiling range are thereafter hydrogenated to produce recycle solvent and liquid products, the improvement which comprises separating the effluent from the liquefaction zone into a hot vapor stream and a liquid stream; cooling the entire hot vapor stream sufficiently to condense vaporized liquid hydrocarbons; separating condensed liquid hydrocarbons from the cooled vapor; fractionating the liquid stream to produce coal liquids in the solvent boiling range; passing the cooled vapor, the coal liquids in the solvent boiling range, and makeup hydrogen to the solvent hydrogenation zone as feed to the hydrogenation zone; and thereafter catalytically hydrogenating the hydrogenation zone feed stream while quenching the hydrogenation reaction with fluids recovered from the hydrogenation zone effluent.