Coal liquefaction process with increased naphtha yields

Details Coal liquefaction process with increased naphtha yields Coal liquefaction process with increased naphtha yields

1985-04-26

1986-08-12

Doll, John

Mineral oils: processes and products

By treatment of solid mineral, e.g., coal liquefaction, etc.

Plural hydrogenation steps

208416, 208417, C10G 100

Patent

active

046054863

ABSTRACT:
An improved process for liquefying solid carbonaceous materials wherein the solid carbonaceous material is slurried with a suitable solvent and then subjected to liquefaction at elevated temperature and pressure to produce a normally gaseous product, a normally liquid product and a normally solid product. The normally liquid product is further separated into a naphtha boiling range product, a solvent boiling range product and a vacuum gas-oil boiling range product. At least a portion of the solvent boiling-range product and the vacuum gas-oil boiling range product are then combined and passed to a hydrotreater where the mixture is hydrotreated at relatively severe hydrotreating conditions and the liquid product from the hydrotreater then passed to a catalytic cracker. In the catalytic cracker, the hydrotreater effluent is converted partially to a naphtha boiling range product and to a solvent boiling range product. The naphtha boiling range product is added to the naphtha boiling range product from coal liquefaction to thereby significantly increase the production of naphtha boiling range materials. At least a portion of the solvent boiling range product, on the other hand, is separately hydrogenated and used as solvent for the liquefaction. Use of this material as at least a portion of the solvent significantly reduces the amount of saturated materials in said solvent.

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U.S. Department of Energy Report No. FE-2566-30, Aug. 1979, and No. FE-2566-42, Oct. 1980, UOP, Inc.

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