Kureha Kagaku Kogyo Kabushiki Kaisha

Chiyoda Chemical Engineering Construction Co., Ltd.

Yutaka Sumida

Masatomo Shigeta

Hiroshi Hozuma

Tomizo Endo

Masaharu Tomizawa

Hideo Kikuchi

Shoichi Motokawa

Masaichi Ohtake

Toru Kawahara

Keiji Nagayama

Kiyoji Ozaki

Takao Ishihara

Takaaki Aiba

Hajime Nakanishi

Hisatsugu Kaji

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

In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor, a portion of the content material in the reactor is taken out and injected back into the reactor according to a specific procedure to form a 'wet wall' or liquid curtain on the inner peripheral wall of the reactor, thereby preventing coking in the reactor. The apparatus includes a radially outwardly extending interior annular recess around an upper portion of the inner wall thereof and forming a part of said inner wall and plural means for tangentially injecting the recycled liquid into said recess.

Apparatus for the thermal cracking of heavy hydrocarbon

In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor, a portion of the content material in the reactor is taken out and injected back into the reactor according to a specific procedure to form a 'wet wall' or liquid curtain on the inner peripheral wall of the reactor, thereby preventing coking in the reactor.

Method for the thermal cracking of heavy hydrocarbon

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Iwaki, Japan

Yutaka Sumida