Three-stage coal liquefaction process

Details Three-stage coal liquefaction process Three-stage coal liquefaction process

C - Chemistry, Metallurgy

10

G

196/5.2

C10G 1/04 (2006.01) C10G 1/00 (2006.01)

Patent

CA 1147684

ABSTRACT OF THE DISCLOSURE "THREE- STAGE COAL LIQUEFACTION PROCESS" Disclosed is a three-stage process for liquefying coal. In the process, subdivided coal is slurried with a hydrogen-lean hydrogen-donor solvent and passed through a dissolving zone at at temperature in the range 400° to 480°C and at a space velocity in the range 2 to 150 hrs. -1 to substantially dissolve said coal. The effluent from the dissolver is stabilized with a hydrogen-rich hydrogen-donor solvent in a stabilization zone at a temperature in the range of 400° to 440°C and at a space velocity in the range 1 to 12 hrs. -1 to partially hydrogenate the dissolved coal. A portion of the effluent from the stabilizer is recycled for use as hydrogen-lean hydrogen-donor solvent and the remainder is passed to a catalytic reaction stage operating under hydrocracking conditions to produce the net product and hydrogen- rich hydrogen-donor solvent.

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