Hydrogen donor solvent coal liquefaction process

Patent · Tue Apr 18 04:00:00 EST 1978

OSTI ID:6707589

Aczel, T; Plumlee, K W

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 constitutents 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.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4085032
• OSTI ID: 6707589
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AROMATICS
CARBOXYLIC ACIDS
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
EXXON LIQUEFACTION PROCESS
FRACTIONATION
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROGENATION
LIQUEFACTION
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
PEROXIDES
QUINONES
RECOVERY
SEPARATION PROCESSES
SYNTHESIS
THERMOCHEMICAL PROCESSES