Coal liquefaction process

Details Coal liquefaction process Coal liquefaction process

1984-08-20

1986-02-11

Doll, John

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8LE, C10G 106, C10G 100

Patent

active

045697493

ABSTRACT:
A process for the liquefaction of coal wherein raw feed coal is dissolved in recycle solvent with a slurry containing recycle coal minerals in the presence of added hydrogen at elevated temperature and pressure. The highest boiling distillable dissolved liquid fraction is obtained from a vacuum distillation zone and is entirely recycled to extinction. Lower boiling distillable dissolved liquid is removed in vapor phase from the dissolver zone and passed without purification and essentially without reduction in pressure to a catalytic hydrogenation zone where it is converted to an essentially colorless liquid product boiling in the transportation fuel range.

REFERENCES:
patent: 4045329 (1977-08-01), Johanson et al.
patent: 4159237 (1979-06-01), Schmid
patent: 4192653 (1980-03-01), Giannetti et al.
patent: 4364817 (1982-12-01), Anderson et al.
patent: 4400263 (1983-08-01), Kydd et al.
patent: 4473460 (1984-09-01), Kuerten et al.
Anderson, et al., "Improving Coal Liquid Quality by Heavy Distillate Recycle" Presented at Seventh Annual EPRI Contractors' Conference on Coal Liquefaction May 11-13, 1983.

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