Coal liquefaction process with increased naphtha yields

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865949

Ryan, Daniel F ^[1]

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1. Friendswood, TX

An improved process for liquefying solid carbonaceous materials wherein the solid carbonaceous material is slurried with a suitable solvent and then subjected to liquefaction at elevated temperature and pressure to produce a normally gaseous product, a normally liquid product and a normally solid product. The normally liquid product is further separated into a naphtha boiling range product, a solvent boiling range product and a vacuum gas-oil boiling range product. At least a portion of the solvent boiling-range product and the vacuum gas-oil boiling range product are then combined and passed to a hydrotreater where the mixture is hydrotreated at relatively severe hydrotreating conditions and the liquid product from the hydrotreater then passed to a catalytic cracker. In the catalytic cracker, the hydrotreater effluent is converted partially to a naphtha boiling range product and to a solvent boiling range product. The naphtha boiling range product is added to the naphtha boiling range product from coal liquefaction to thereby significantly increase the production of naphtha boiling range materials. At least a portion of the solvent boiling range product, on the other hand, is separately hydrogenated and used as solvent for the liquefaction. Use of this material as at least a portion of the solvent significantly reduces the amount of saturated materials in said solvent.

• Research Organization: Exxon Research and Engineering Co. (Florham Park, NJ)
• DOE Contract Number: FC01-77ET10069
• Assignee: Exxon Research and Engineering Co. (Florham Park, NJ)
• Patent Number(s): US 4605486
• OSTI ID: 865949
• Country of Publication: United States
• Language: English

Related Subjects

coal
liquefaction
process
increased
naphtha
yields
improved
liquefying
solid
carbonaceous
materials
material
slurried
suitable
solvent
subjected
elevated
temperature
pressure
produce
normally
gaseous
product
liquid
separated
boiling
range
vacuum
gas-oil
portion
boiling-range
combined
passed
hydrotreater
mixture
hydrotreated
relatively
severe
hydrotreating
conditions
catalytic
cracker
effluent
converted
partially
added
significantly
increase
production
hand
separately
hydrogenated
reduces
amount
saturated
significantly reduce
suitable solvent
improved process
carbonaceous materials
liquefaction process
elevated temperature
coal liquefaction
carbonaceous material
solid carbonaceous
gaseous product
liquid product
boiling range
solid product
normally liquid
significantly reduces
solvent boiling
normally solid
solid carbon
catalytic cracker
naphtha yields
increased naphtha
significantly increase
liquefying solid
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