Mobil Oil Corporation

John C Bixel

Michael J Dabkowski

William F Heaney

Tsoung Y Yan

Edward J Bellow, Jr

Sandra H Facinelli

Edward J Bellow

Particulate coal is rendered less subject to spontaneous ignition by simultaneously spraying or otherwise contacting it and cooling it with an aqueous emulsion in water of a light cycle oil, heavy cycle oil, clarified slurry oil, durene, and other carbonaceous materials derived from coal liquefaction and petroleum refining. Aqueous polymer emulsions and oxidation inhibitors can also be used.

Drying low rank coal and retarding spontaneous ignition

Particulate coal is rendered less subject to spontaneous ignition by simultaneously spraying or otherwise contacting it and cooling it with an aqueous emulsion in water of foots oils, petrolatum filtrate, or hydrocracker recycle oils in water.

Coal is rendered less subject to abrasion and disintegration by reducing it to a 0.2 to 0.5-inch particle size and drying it at a temperature of 200.degree. to 230.degree. F. for 3-7 minutes. The coal is rendered less susceptible to spontaneous ignition by the application of a treating agent which is a petroleum resid mixed with clarified slurry oil or a petroleum resid mixed with a distillate.

Method for passivating low rank dried coal

Particulate coal is rendered less subject to spontaneous ignition by spraying or otherwise contacting it with a light cycle oil, heavy cycle oil, clarified slurry oil, a solution of durene in gasoline and mixtures of two or more of the preceding.

Method for producing a deactivated dried coal

Coal is rendered less subject to abrasion and disintegration by reducing it to a 0.2 to 0.5-inch particle size and drying it at a temperature of 200.degree. to 230.degree. F. for 3-7 minutes. The coal can be rendered less susceptible to spontaneous ignition by the application of a treating agent which can be a light cycle oil, heavy cycle oil, clarified slurry oil, a petroleum or coal derived distillate or residuum, a solution of durene in gasoline and mixtures of two or more of the preceding.

Coal is rendered less subject to abrasion and disintegration by reducing it to a 0.2 to 0.5-inch particle size and drying it in a drying zone at a temperature of 200.degree. to 230.degree. F. for 3-7 minutes while simultaneously applying a treating agent which can be a light cycle oil, heavy cycle oil, clarified slurry oil, a petroleum or coal derived distillate or residuum, a solution of durene in gasoline and mixtures of two or more of the preceding.

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Washington Crossing, PA, United States of America

John C Bixel