Occidental Research Corporation

Occidental Petroleum

Leon Robinson

Allan S Sass

Hans F Bauer

James R Longanbach

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.

Process for reducing the sulfur content of coal and coal char and the

A process for reducing the sulfur content of char by means of a basic molten bath of an alkali metal or alkaline earth metal salt of a hydroxyaryl or an alcohol.

Process for desulfurizing char

This invention covers a process for reducing the sulfur content of char by washing the char with an acid followed by treatment with hydrogen gas.

Method for desulfurizing char by acid washing and treatment with

This invention covers a process for reducing the sulfide sulfur content of char by treatment with a gaseous mixture of carbon dioxide and H.sub.2 O.

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Upland, CA, United States of America

Leon Robinson