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:
Aug. 02, 1983
Filed:
Nov. 19, 1980
Earl D York, Englewood, CO (US);
Standard Oil Company (Indiana), Chicago, IL (US);
Abstract
Disclosed is an improved method for the retorting of oil shale comprising passing feed comprising oil shale to a contacting zone wherein the feed oil shale is contacted with heat transfer medium to heat said shale to retorting temperature. Retorting of the feed oil shale is substantially effected to form fluid material having heating value and forming partially spent oil shale comprising inorganic and carbonaceous material. At least a portion of the partially spent oil shale is passed to a combustion zone wherein the partially spent oil shale is contacted with oxidizing gas comprising oxygen to substantially combust carbonaceous material and forming spent oil shale. At least a portion of the spent shale is passed to a cooling zone to remove heat from the spent shale and at least a portion of the spent shale from the cooling zone is recycled to the contacting zone.