Liquefaction of sub-bituminous and lignitic coal

Details Liquefaction of sub-bituminous and lignitic coal Liquefaction of sub-bituminous and lignitic coal

1975-06-06

1977-06-07

Gantz, Delbert E.

Mineral oils: processes and products

Phenolic or toxic oils

208 10, C10G 106

Patent

active

040282210

ABSTRACT:
In the liquefaction of a sub-bituminous and/or lignitic coal, prior to the liquefaction, the coal is soaked at a temperature of from 550.degree. to 750.degree. F and a pressure of from 30 to 300 psig for a time sufficient to remove at least 10% of the organic oxygen present in the coal to thereby reduce the hydrogen requirements of the liquefaction. The liquefaction is effected with a pasting solvent derived from the sub-bituminous and/or lignitic coal having a 5 volume percent distillation temperature of at least 550.degree. F and containing at least 25 weight percent of material boiling above 800.degree. F. The use of such a pasting solvent provides for improved dispersion of the coal particles during the liquefaction.

REFERENCES:
patent: 2106973 (1938-02-01), Ellis
patent: 3540995 (1970-11-01), Wolk et al.
patent: 3607719 (1971-09-01), Johnson et al.

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