Coal liquefaction process utilizing selective heat addition

Details Coal liquefaction process utilizing selective heat addition Coal liquefaction process utilizing selective heat addition

C - Chemistry, Metallurgy

10

G

196/5.8

C10G 1/06 (2006.01)

Patent

CA 1132925

COAL LIQUEFACTION PROCESS UTILIZING SELECTIVE HEAT ADDITION ABSTRACT OF THE DISCLOSURE A process for liquefying coal involving heating only a portion (70) of the total process hydrogen stream (62) to increase its temperature to a relatively high level and admixing said heated hydrogen with only a portion (56) of the total coal slurry (54) in the up- stream region of a dissolver zone (58). The hydrogen stream has a relatively low specific heat and the addition thereto of a relatively small amount of heat increases its temperature to a level which is sufficiently high to initiate hydrocracking reactions when the hot hydrogen stream is intermixed with only a portion (56) of the dissolver feed slurry, provided that the dissolver feed slurry contains recycle mineral residue in an amount adequate to catalyze hydrocracking reactions. Because the recycle mineral residue catalyzes the exothermic hydrocracking reactions, sufficient process heat is generated to permit addition to the dissolver zone (58) in a downstream region thereof the remainder (60) of dissolver feed slurry and process hydrogen (74) in a relatively cool condition.

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