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:
Jul. 31, 1979
Filed:
Jun. 07, 1978
Thomas W Clapper, Oklahoma City, OK (US);
Kerr-McGee Corporation, Oklahoma City, OK (US);
Abstract
This invention relates to a process for removing finely divided insoluble particulate materials from crude shale oils. A feed comprising crude shale oil that contains insoluble particulate material is mixed with a solvent and thereafter separated in a first separation zone into a first light fraction comprising the crude shale oil and the solvent and a first heavy fraction comprising the insoluble particulate material, some crude shale oil and some dissolving solvent. The first light fraction then is withdrawn and subjected to a second separation in a second separation zone. In the second separation zone, the first light fraction is separated into a plurality of fractions of crude shale oil and solvent. The crude shale oil fractions then are separated, withdrawn and subjected to subsequent hydrorefining, while the solvent is recovered and recycled to provide additional feed mixture.