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:
Jul. 09, 1996
Filed:
Mar. 21, 1994
Applicant:
Inventors:
E Sean Griggs, Indianapolis, IN (US);
William R Roder, Indianapolis, IN (US);
Assignee:
Reilly Industries, Inc., Indianapolis, IN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ; C10C / ; C10C / ;
U.S. Cl.
CPC ...
208425 ; 208424 ; 208 39 ; 208 41 ;
Abstract
Described are novel processes for treating high-ash coal tars to produce coal tars which are suitable for distillation to form binder pitch. Preferred processes of the invention involve multi-stage centrifugations to reduce ash and preferably also quinoline insoluble levels. Processes of the invention also provide for the treatment of coal tar sludges to recover valuable coal tar distillate and dried, free-flowing coal related material having high fuel value.