Solvent refined coal process

Details Solvent refined coal process Solvent refined coal process

1977-12-29

1980-02-26

Gantz, Delbert E.

Mineral oils: processes and products

Phenolic or toxic oils

208 10, C10G 100, C10G 106

Patent

active

041905180

ABSTRACT:
A slurry composed of coal and a solvent containing donatable hydrogen, together with hydrogen, is subjected to catalyst-free hydrogenation conditions in a first hydrogenation zone to form an intermediate coal-solvent slurry. After removing ash from the intermediate coal-solvent slurry to form a coal-solvent solution, the coal-solvent solution is subjected to catalytic hydrogenation conditions in a second hydrogenation zone to obtain a product that can be separated at ambient pressure into (a) a first liquid fraction boiling at a temperature in the range of about 100.degree. to about 375.degree. C., (b) a second liquid fraction boiling above said first liquid fraction at a temperature in the range of about 200.degree. to about 525.degree. C. and (c) a solid and/or semi-solid material. Following the separation, at least a portion of the second liquid fraction is recycled to the first hydrogenation zone.

REFERENCES:
patent: 3184401 (1965-05-01), Gorin
patent: 3575847 (1971-04-01), Sprow et al.
patent: 3884796 (1975-05-01), Hinderliter et al.
patent: 4018663 (1977-04-01), Karr, Jr.
patent: 4083769 (1978-04-01), Hildebrand et al.

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