Hydrogen donor solvent coal liquefaction process

Patent · Tue Apr 18 04:00:00 EST 1978

OSTI ID:6725509

Plumlee, K W

An indigenous hydrocarbon product stream boiling within a range of from about C/sub 1/-700/sup 0/F, preferably C/sub 1/-400/sup 0/F, is treated to produce an upgraded hydrocarbon fuel component and a component which can be recycled, with a suitable donor solvent, to a coal liquefaction zone to catalyze the reaction. In accordance therewith, a liquid hydrocarbon fraction with a high end boiling point range up to about 700/sup 0/F, preferably up to about 400/sup 0/F, is separated from a coal liquefaction zone effluent, the separated fraction is contacted with an alkaline medium to provide a hydrocarbon phase and an aqueous extract phase, the aqueous phase is neutralized, and contacted with a peroxygen compound to convert indigenous components of the aqueous phase of the hydrocarbon fraction into catalytic components, such that the aqueous stream is suitable for recycle to the coal liquefaction zone. Naturally occurring phenols and alkyl substituted phenols, found in the aqueous phase, are converted, by the addition of hydroxyl constituents to phenols, to dihydroxy benzenes which, as disclosed in copending Application Ser. Nos. 686,813 now U.S. Pat. No. 4,049,536; 686,814, now U.S. Pat. No. 4,049,537;686,827 now U.S. Pat. No. 4,051,012 and 686,828, K.W. Plumblee et al, filed May 17, 1976, are suitable hydrogen transfer catalysts.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4085033
• OSTI ID: 6725509
• 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
COAL LIQUEFACTION
COAL LIQUIDS
EXXON LIQUEFACTION PROCESS
FRACTIONATION
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXY COMPOUNDS
LIQUEFACTION
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
PEROXIDES
PHENOLS
QUINONES
RECYCLING
SEPARATION PROCESSES
SYNTHESIS
THERMOCHEMICAL PROCESSES