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:
Apr. 03, 1984
Filed:
Aug. 30, 1982
Applicant:
Inventor:
P Henrik Wallman, Berkeley, CA (US);
Assignee:
Chevron Research Company, San Francisco, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ; C10B / ; C10B / ;
U.S. Cl.
CPC ...
208 / ; 201 31 ;
Abstract
Heat transfer particles of fluidizable size are selected for recycling to the pyrolysis zone to broaden usable size range of oil shale feed. These recycle particles should all be of a fluidizable size and when mixed with the raw oil shale the total amount of fluidizable particles should comprise not less than about 60 weight percent of the particles in the mixture. This process is especially useful when the heat transfer material is recycled oil shale particles. The present invention is particularly advantageous when the oil shale is pyrolyzed in a vertical retorting vessel containing a fluidized bed above a packed bed of particles.