Process for the low-temperature depolymerization of coal and its

Mineral oils: processes and products – By treatment of solid mineral – e.g. – coal liquefaction – etc. – Plural hydrogenation steps

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208403, 208405, 208406, 208420, 208422, C10G 106

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active

047284188

ABSTRACT:
A novel process for the low-temperature depolymerization and liquefaction of coal wherein the coal is subjected to sequential processing steps for the cleavage of different types of intercluster lnikages during each processing step. A metal chloride catalyst is intercalated in finely crushed coal and the coal is partially depolymerized under mild hydrotreating conditions during the first processing step. In the second processing step the product from the first step is subjected to base-catalyzed depolymerization with an alcoholic solution of an alkali hydroxide, yielding an almost fully depolymerized coal, which is then hydroprocessed with a sulfided cobalt molybdenum catalyst in a third processing step to obtain a hydrocarbon oil as the final product.

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