Hydrogen donor solvent coal liquefaction process

Details Hydrogen donor solvent coal liquefaction process Hydrogen donor solvent coal liquefaction process

1976-12-29

1978-04-18

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8, C10G 106

Patent

active

040850323

ABSTRACT:
An indigenous aqueous stream can be treated and then recycled, with a suitable donor solvent, to a coal liquefaction zone to catalyze the reaction. In one embodiment, an aqueous fraction is separated from a coal liquefaction zone effluent, a quinone solids portion of the separated fraction is concentrated within the liquid by evaporation of water therefrom to form a slurry, and the slurry is then recycled to the coal liquefaction zone to catalyze the coal liquefaction reaction. Naturally occurring phenols and alkyl substituted phenols, also found within the aqueous stream, can also be converted to quinones, if desired, by a chemical reaction which favors the addition of hydroxyl consitutents to the phenols to form dihydroxy benzenes. Quinones, as disclosed in copending Applications Ser. No. 686,813 now U.S. Pat. No. 4,049,536; Ser. No. 686,814 now U.S. Pat. No. 4,049,537; Ser. No. 686,827 now U.S. Pat. No. 4,051,012 and Ser. No. 686,828, K. W. Plumlee et al, filed May 17, 1976, are suitable hydrogen transfer catalysts.

REFERENCES:
patent: 3700583 (1972-10-01), Salamony et al.

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