Liquefaction of solid carbonaceous material with catalyst recycl

Details Liquefaction of solid carbonaceous material with catalyst recycl Liquefaction of solid carbonaceous material with catalyst recycl

1989-01-09

1992-06-16

Pal, Asok

Mineral oils: processes and products

By treatment of solid mineral, e.g., coal liquefaction, etc.

Plural hydrogenation steps

208413, 208416, 208417, 208420, C10G 108

Patent

active

051222604

ABSTRACT:
In the two stage liquefaction of a carbonaceous solid such as coal wherein coal is liquefied in a first stage in the presence of a liquefaction solvent and the first stage effluent is hydrogenated in the presence of a supported hydrogenation catalyst in a second stage, catalyst which has been previously employed in the second stage and comminuted to a particle size distribution equivalent to 100% passing through U.S. 100 Mesh, is passed to the first stage to improve the overall operation.

REFERENCES:
patent: 3679573 (1972-07-01), Johnson
patent: 3932266 (1976-01-01), Sze et al.
patent: 4157291 (1979-06-01), Paraskos et al.
patent: 4411767 (1983-10-01), Garg
patent: 4473460 (1984-09-01), Kuerten et al.

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