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:
Sep. 05, 1978
Filed:
Mar. 31, 1977
Applicant:
Inventors:
Gerhard Pietzka, Vockenhausen, Ts., DE;
Harald Tillmanns, Kelkheim, DE;
Assignee:
Sigri Elektrographit GmbH, Meitingen bei Augsburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10G / ;
U.S. Cl.
CPC ...
208131 ; 208 88 ; 423445 ; 423448 ; 423449 ;
Abstract
Manufacture of pitch coke with needle-like structure by mixing pyrolysis oil condensate formed in the process with a coal-tar pitch having a softening point between 70.degree. and 150.degree. C, filtering the mixture at a temperature 100.degree. to 200.degree. C above the softening point, heating the filtrate to a temperature between 450.degree. and 525.degree. C in a tubular heater and coking the heated filtrate in a coking drum, passing volatile pyrolysis products from the drum to a fractionating column for separation of pyrolysis oil condensate from non-condensible gas.