Coal liquefaction process with controlled recycle of ethyl acetate-insolubles

Patent · Tue Jan 31 04:00:00 EST 1984

OSTI ID:5000169

Kuehler, C W; Samil, B

A process for increasing the conversion of coal to ethyl acetate-soluble products comprising: (a) heating a slurry comprising a solvent and particulate coal in a dissolution zone to produce a first effluent slurry comprising ethyl acetate-soluble liquid components and ethyl acetate-insolubles; (b) contacting at least a portion of said first effluent slurry with hydrogen in a reaction zone in the presence of an externally-supplied hydrogenation catalyst under hydrogenation conditions to produce a second effluent slurry which comprises ethyl acetate-soluble liquid components and ethyl acetate-insolubles, said ethyl acetate insolubles comprising organic components and inorganic components; (c) partitioning said ethyl acetate-insolubles in at least a portion of said second effluent slurry to provide a solids-rich fraction containing ethyl acetate-insolubles enriched in inorganic components and a solids-lean fraction containing ethyl acetate insolubles enriched in organic components; and (d) recycling at least a portion of said solids-lean fraction to said dissolution zone, said recycle stream containing ethyl acetate-insolubles in an amount (1) sufficient to increase substantially the conversion of said coal to ethyl acetate-soluble components and (2) insufficient to cause the hydrogenation fouling rate of said catalyst to exceed 0.3/sup 0/ C. per hour.

• Assignee: Chevron Research Company
• Patent Number(s): US 4428820
• OSTI ID: 5000169
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ACETIC ACID ESTERS
CARBOXYLIC ACID ESTERS
CATALYSTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
CONTROL
DISPERSIONS
DISSOLUTION
ESTERS
FLUIDS
FUEL SLURRIES
FUELS
HEAT TREATMENTS
HYDROGENATION
LIQUEFACTION
LIQUIDS
MIXTURES
ORGANIC COMPOUNDS
PROCESS CONTROL
RECYCLING
SLURRIES
SOLUBILITY
SOLVENT PROPERTIES
SUSPENSIONS
THERMOCHEMICAL PROCESSES
YIELDS