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:
Jun. 16, 1987
Filed:
Sep. 26, 1984
Tadaaki Orihashi, Kobe, JP;
Hiroshi Tsuji, Kobe, JP;
Kazuhiko Ogawa, Kobe, JP;
Masao Hayashitani, Kobe, JP;
Seiji Terada, Kobe, JP;
Tsugio Miyagawa, Toke, JP;
Hideo Isozaki, Yachiyo, JP;
Jushitsuyu Taisaku Gijutsu Kenkyu Kumiai, Tokyo, JP;
Abstract
An extraction residue obtained by solvent deasphalting of a residual oil is mixed with a carrier gas and thermally cracked at a temperature of 400.degree. C. to 600.degree. C. in a tube-type cracking apparatus to obtain cracked oil and pitch. The use of the carrier gas, which may be either an inert gas such as nitrogen or a reactive gas such as hydrogen, permits a flow velocity through the cracking apparatus sufficient to substantially prevent coking. Preferably, the cracking conditions are controlled so that the yield of cracked oil is not more than about 30 to 35%.