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 DEG F. to about 575 DEG 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 DEG F. to about 125 DEG 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).
Inventors
👤 John G. Gatsis
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 01:56
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
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° F. to about 575° F.; (b) reducing the temperature before deashing of the entire resulting admixture of said primary coal liquid and hydrocarbon deashing solvent to a deashing temperature about 50° F. to about 125° F. less than said admixing temperature of step (a); (c) deashing said primary coal liquid with said deashing solvent at said deashing temperature of step (b).
Claim 2
Dependent Claim
101 words
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° F. to about 575° F.; (b) reducing the temperature before deashing of the entire resulting admixture of said primary coal liquid and hydrocarbon deashing solvent to a deashing temperature about 50° F. to about 125° F. less than said admixing temperature of step (a); (c) deashing said primary coal liquid with said deashing solvent at said deashing temperature of step (b).
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said hydrocarbon deashing solvent is hexane.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said hydrocarbon deashing solvent is toluene.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein said hydrocarbon deashing solvent is a mixture of toluene and hexane.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein said deashing is performed at a pressure from about 10 to about 1000 psig.
Claim 7
Dependent Claim
27 words
The process of claim 1 wherein said deashing is performed with a hydrocarbon deashing solvent to coal liquid volume ratio of from about 1:1 to about 30:1.