Process for deashing primary coal liquids
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/sup 0/ F. to about 575/sup 0/ 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/sup 0/ F. to about 125/sup 0/ 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).
- Assignee:
- UOP Inc.
- Patent Number(s):
- US 4476012
- OSTI ID:
- 6096216
- Country of Publication:
- United States
- Language:
- English
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