Method for the generation of recycle solvents in coal...

Details Method for the generation of recycle solvents in coal... Method for the generation of recycle solvents in coal...

C - Chemistry, Metallurgy

10

G

196/5.9

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

Patent

CA 1163941

F-0858 AN IMPROVED METHOD FOR THE GENERATION OF RECYCLE SOLVENTS IN COAL LIQUEFACTION Abstract A method is described to improve a coal liquefaction process by the use of a recycle solvent comprised of two fractions: the first, a lower boiling fraction, is obtained by an atmospheric distillation and is subsequently hydrotreated to enrich its hydrogen donor capacity; the second is a higher boiling fraction that is enriched in desirable hydrogen transfer agents by a solvent extraction process. The combined recycle solvent thus obtained is more efficient in transferring gas phase H2 to the coal and enables other significant process improvements.

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