Coal liquefaction with preasphaltene recycle

Details Coal liquefaction with preasphaltene recycle Coal liquefaction with preasphaltene recycle

1985-02-21

1986-09-02

Metz, Andrew H.

Mineral oils: processes and products

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

Plural hydrogenation steps

208312, 208315, 208322, 208366, 208417, 208418, 208430, 208435, 208952, C10G 100, C10G 1704, C10G 2102, C10G 2112

Patent

active

046094555

ABSTRACT:
A coal liquefaction system is disclosed with a novel preasphaltene recycle from a supercritical extraction unit to the slurry mix tank wherein the recycle stream contains at least 90% preasphaltenes (benzene insoluble, pyridine soluble organics) with other residual materials such as unconverted coal and ash. This subject process results in the production of asphaltene materials which can be subjected to hydrotreating to acquire a substitute for No. 6 fuel oil. The preasphaltene-predominant recycle reduces the hydrogen consumption for a process where asphaltene material is being sought.

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