Coal liquefaction with subsequent bottoms pyrolysis

Patent · Sun Jan 01 00:00:00 EST 1978

OSTI ID:863059

Walchuk, George P ^[1]

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1. Queens, NY

In a coal liquefaction process wherein heavy bottoms produced in a liquefaction zone are upgraded by coking or a similar pyrolysis step, pyrolysis liquids boiling in excess of about 1000.degree. F. are further reacted with molecular hydrogen in a reaction zone external of the liquefaction zone, the resulting effluent is fractionated to produce one or more distillate fractions and a bottoms fraction, a portion of this bottoms fraction is recycled to the reaction zone, and the remaining portion of the bottoms fraction is recycled to the pyrolysis step.

• DOE Contract Number: E(49-18)-2353
• Assignee: Exxon Research & Engineering Co. (Linden, NJ)
• Patent Number(s): US 4085031
• OSTI ID: 863059
• Country of Publication: United States
• Language: English

Related Subjects

coal
liquefaction
subsequent
bottoms
pyrolysis
process
heavy
produced
zone
upgraded
coking
similar
step
liquids
boiling
excess
1000
degree
reacted
molecular
hydrogen
reaction
external
resulting
effluent
fractionated
produce
distillate
fractions
fraction
portion
recycled
remaining
molecular hydrogen
bottoms fraction
liquefaction zone
liquefaction process
coal liquefaction
reaction zone
remaining portion
pyrolysis step
distillate fraction
distillate fractions
heavy bottoms
liquids boiling
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