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:
Apr. 10, 1979
Filed:
Oct. 21, 1977
Applicant:
Inventors:
John A Paraskos, Pittsburgh, PA (US);
Edward W Smith, Houston, TX (US);
Assignee:
Gulf Research & Development Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G / ; C10G / ;
U.S. Cl.
CPC ...
208177 ; 208298 ; 208 / ;
Abstract
A process for separating tar and solid particles from coal liquefaction products using a highly selective halogenated aliphatic solvent which removes essentially all of the tar and solid particles from the coal liquefaction products wherein a minimum amount of energy is used. This is accomplished by contacting said coal liquefaction products with the halogenated aliphatic solvent to form two phases, one containing said tar and solid particles and the other containing said solvent and the remainder of said coal liquefaction products.