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:
Nov. 30, 1993
Filed:
May. 01, 1992
Applicant:
Inventors:
Joseph T Joseph, DuPage County, IL (US);
Marc G Davidson, Will County, IL (US);
Joseph D Fox, Will County, IL (US);
Assignee:
Amoco Corporation, , US;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208400 ; 208403 ; 208415 ; 208419 ; 208428 ; 44620 ;
Abstract
An improved, low severity coal liquefaction process is disclosed. In accordance with the process, coal is first decarboxylated and demineralized with hot sulfurous acid. The decarboxylated coal is then liquefied in the presence of an alcohol and an alkali metal hydroxide. In several embodiments, alkali metal-containing materials are reclaimed to produce alkali metal hydroxide for the liquefaction step. In other embodiments, the liquefaction is conducted in the presence of a relatively high-boiling diluent such as a coal-derived liquid.