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:
Jan. 09, 1979
Filed:
Jun. 30, 1977
David S Mitchell, San Rafael, CA (US);
David R Sageman, San Rafael, CA (US);
Chevron Research Company, San Francisco, CA (US);
Abstract
A continuous process and apparatus are disclosed for the retorting or gasification of hydrocarbon-containing solids such as oil shale, coal, tar sands, etc., wherein the solids are retorted or gasified in a combined entrained and fluidized bed. A solid fluidized heat-transfer material flows downwardly through a conversion zone. Subdivided hydrocarbon-containing solids are introduced into a central portion of the conversion zone, with smaller particles of the solids being entrained and moving upwardly through the conversion zone countercurrent to the flow of the fluidized heat-transfer material, and larger particles of the solids being fluidized and moving downwardly through the conversion zone concurrent with the flow of the heat-transfer material. A fluidizing gas is injected into a lower portion of the conversion zone and a portion of the solids is combusted, providing the necessary heat for the conversion reactions. Substantially plug flow of the heat-transfer solid and the hydrocarbon-containing solids is maintained by including in the conversion zone means for impeding back mixing, such as a packing material filling the conversion zone.