Two-stage coal liquefaction process

Details Two-stage coal liquefaction process Two-stage coal liquefaction process

C - Chemistry, Metallurgy

10

G

196/5.2

C10G 1/04 (2006.01) C10G 1/00 (2006.01) C10G 1/06 (2006.01)

Patent

CA 1234364

ABSTRACT OF THE DISCLOSURE A process for liquefying coal by first forming a coal solvent slurry. In a hydrothermal dissolving-stripping zone the coal is substantially dissolved in the solvent to form a mixture comprising solvent, dissolved coal, insoluble solids, and light products, while simultaneously the mixture is stripped of substantial amounts of the light products by contacting the slurry countercurrently with a first hydrogen gas stream at elevated temperatures. A gaseous stream com- prising the light products is withdrawn from the hydrothermal dissolving-stripping zone. At least a substantial amount of the insoluble solids is contacted in a reaction zone with a second hydrogen gas stream and an externally supplied hydro- cracking catalyst under hydrocracking conditions.

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