Kureha Kagaku Kogyo Kabushiki Kaisha

Sumitomo Metal Industries, Inc.

Chiyoda Chemical Engineering Construction Co., Ltd.

Sumikin Coke Company Limited

Hisatsugu Kaji

Takao Ishihara

Takaaki Aiba

Hajime Nakanishi

Tomizo Endo

Naoshi Kawabe

Kiyoji Ozaki

Naotaka Miwa

Yutaka Sumida

Tatsuya Inoue

Masato Izumi

Fumiaki Tanaka

Toshio Shinozuka

Disclosed is a method for the thermal cracking of a heavy petroleum oil to produce a pitch with a high aromaticity having a high softening point, the ratio of H/C of about 0.4 to 1.1 and the fraction insoluble in n-heptane but soluble in quinoline of higher than 55% by weight and an oil mainly composed of aliphatic hydrocarbon by feeding the heavy petroleum oil into a reaction system and bringing it therein into contact with a gas which does not react with the heavy petroleum oil, of a temperature in the range of from 400.degree. C. to 2000.degree. C., which method is improved by using, as the reaction system, a plurality of reaction vessels arranged in series and having their interior temperatures successively lower by a fixed step in the direction of the transfer of the charge.

Method for thermal cracking of heavy petroleum oil

Disclosed herein is a method of thermally cracking a heavy petroleum oil by introducing the heavy petroleum oil into a reactor and contacting the heavy petroleum oil thus introduced with a gas, which does not react with the heavy petroleum oil, at a temperature of 400.degree.-2000.degree. C. thereby thermally cracking the heavy petroleum oil. The method uses plural reactors and introduces the heavy petroleum oil into the reactors in a specified manner, and charges the reactor in advance with a specified amount of heavy petroleum oil of a specified temperature.

Method of thermally cracking heavy petroleum oil

Disclosed is a method of transporting liquid pitch containing lumpy coke wherein the lumpy coke contained in the liquid pitch is pulverized by a specific procedure and the pitch containing the thus pulverized coke is then transported. Disclosure is also made for a specific apparatus used for the method.

Method of transporting liquid pitch containing lumpy cokes and apparatus

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Ichihara, Japan

Hisatsugu Kaji