Kureha Kagaku Kogyo Kabushiki Kaisha

Chiyoda Chemical Engineering Construction Co., Ltd.

Hajime Nakanishi

Naoshi Kawabe

Naotaka Miwa

Hisatsugu Kaji

Takeshi Nomura

Hiroshi Hozuma

Tomizo Endo

Kiyoji Ozaki

Hisao Takahashi

Takao Ishihara

Takaaki Aiba

Yoshitomo Ohara

Yutaka Sumida

Fumiaki Tanaka

Minoru Akimoto

Tatsuya Inoue

Masato Izumi

Toshio Shinozuka

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

A decoking device suitable for use on a reaction vessel for the thermal cracking of heavy petroleum oils, including an assembly mounted on top of the reaction vessel and having a cylinder and a piston slidably and rotatably received in the cylinder, the cylinder and piston defining a scrubbing liquid chamber which is sealed from the outside. A scrubbing liquid is fed through the scrubbing liquid chamber to a main injection pipe to inject the liquid through a multitude of jet nozzles in the main injection pipe against the inner wall surfaces of the reaction vessel, the main injection pipe being connected to the piston for movement therewith.

Decoking apparatus

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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Fujisawa, Japan

Hajime Nakanishi