The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 1984
Filed:
Oct. 06, 1982
John G Gatsis, Des Plaines, IL (US);
UOP Inc., Des Plaines, IL (US);
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).