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:
Feb. 12, 1980
Filed:
Nov. 07, 1975
Applicant:
Inventors:
James R Longanbach, Claremont, CA (US);
Leon Robinson, Upland, CA (US);
Assignee:
Occidental Petroleum Corporation, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10L / ; C10B / ;
U.S. Cl.
CPC ...
44 / ; 44 / ; 201 17 ;
Abstract
This invention covers a process for reducing the sulfur content of coal and coal char and the ignition temperature of coal char. Coal is converted into char at temperatures not in excess of about 1600.degree. F. The char is introduced into a caustic system which is maintained at a temperature between about 500.degree. F. to about 750.degree. F. Intimate contact is maintained between the caustic and the char for a period of about 2 to 30 minutes to leach the sulfur from the char. The desulfurized char is thereafter separated from the caustic and washed.