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US 4,382,855 AGranted
Process for removal of hydroxy- and/or mercapto-substituted hydrocarbons from coal liquids
AssigneeAshland Oil, Inc.
InventorsClifford Ward, Charles A. Johnson, III
Life of this patent
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Abstract
Removal of hydroxy-substituted and/or mercapto-substituted-hydrocarbons from coal liquids which comprises contacting the coal liquids with an aqueous composition containing an alkanolamine, thereby providing a two-phase mixture, and then separating the mixture into an aqueous extract phase and a naphtha rich raffinate phase.
Claims19
A process for removing substituted hydrocarbons selected from the group of hydroxy substituted hydrocarbons, mercapto-substituted hydrocarbons, and mixtures thereof from admixture with liquid coal naphtha boiling below about 400.degree. F. which comprises:
- (a) contacting said admixture with an aqueous composition of a water-miscible alkanolamine containing at least about 40% by weight of said alkanolamine, thereby resulting in a two phase mixture;
- (b) separating the two phase mixture into an aqueous extract phase and a naphtha raffinate phase;
- (c) admixing the aqueous extract phase with additional water to increase the water content thereof to about 70 to about 85 weight % and thereby forming a second naphtha phase and second aqueous extract phase;
- (d) separating the second naphtha phase and second aqueous extract phase from each other;
- and
- (e) separating the second aqueous extract phase into an aqueous-alkanolamine phase and a hydrocarbon phase containing said substituted hydrocarbons.
3 more elements
Dependencies are inferred from the claim text.