Process for deashing primary coal liquids

Details Process for deashing primary coal liquids Process for deashing primary coal liquids

1982-10-06

1984-10-09

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Metal contaminant removal

208 8LE, 44 50, 44 51, 44 56, 44 1A, 44 1B, C10G 104, C10G 2100

Patent

active

044760124

ABSTRACT:
A process for deashing primary coal liquids with a selective hydrocarbon solvent separation wherein the coal liquids and selective hydrocarbon solvent are contacted initially at a temperature greater than the temperature at which the deashing separation occurs. More particularly, a process for the production of deashed coal liquid which comprises the sequential steps of: (a) admixing a primary coal liquid containing ash and a hydrocarbon deashing solvent having no hydrogen-transferring ability at a selected admixing temperature from about 250.degree. F. to about 575.degree. F.; (b) reducing the temperature of the entire resulting admixture of the primary coal liquid and hydrocarbon deashing solvent to a deashing temperature about 50.degree. F. to about 125.degree. F. less than the admixing temperature of step (a); and deashing the primary coal liquid with the deashing solvent at the deashing temperature of step (b).

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patent: 4225420 (1980-09-01), Rhodes
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