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US 4,303,496 AGranted
Coal liquefaction process
AssigneeMobil Oil Corporation
InventorLeslie R. Rudnick
Life of this patent
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Abstract
The invention is directed to undertaking the liquefaction of coal in the presence of lignin.
Claims8
A process for the liquefaction of coal comprising admixing the coal to be subjected to liquefaction with lignin wherein the amount of lignin ranges from about 0.01 to about 1% based on the weight of the coal;
- introducing the mixture of coal and lignin to a dissolver wherein said mixture is subjected to elevated temperature and elevated pressure for a period of time ranging from 0.5 to 180 minutes
- wherein said elevated temperature ranges from about 600.degree. F. to about 1000.degree. F. and wherein said elevated pressure ranges from about 50 to about 3000 psig;
- and
- separating light hydrocarbon fractions from a mixture of ash, undissolved coal, deashed coal and high quality coal extracts.
1 more element
Dependencies are inferred from the claim text.