Staged temperature hydrogen-donor coal liquefaction process

Patent · Tue Aug 11 04:00:00 EDT 1981

OSTI ID:6263308

Maa, P S; Vernon, L W

An increased yield of hydrogenated liquid product is obtained from coal by contacting the feed coal with a hydrogen-donor solvent and a hydrogen-containing gas in a series of two or more liquefaction zones arranged in series and operated in such a manner that the temperature in each zone increases from the initial to the final zone. The effluent from each liquefaction zone is passed to the next succeeding higher temperature zone in the series. Liquid hydrocarbonaceous products are recovered from the effluent withdrawn from the last zone. Hydrogen-donor solvent may be produced in the process by catalytically hydrogenating at least a portion of the liquid product from the last liquefaction zone, recovering a liquid fraction from the product of the catalytic hydrogenation and separating a hydrogen-donor solvent from the liquid fraction.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4283267
• OSTI ID: 6263308
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CATALYSTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
CONTROL
EXXON LIQUEFACTION PROCESS
HYDROCARBONS
HYDROGEN TRANSFER
HYDROGENATION
LIQUEFACTION
MANAGEMENT
MATERIALS RECOVERY
ORGANIC COMPOUNDS
PROCESSING
RECOVERY
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
TIME MEASUREMENT
WASTE MANAGEMENT
WASTE PROCESSING