Kureha Kagaku Kogyo Kabushiki Kaisha

Chiyoda Chemical Engineering Construction Co., Ltd.

Masaharu Tomizawa

Hiroshi Hozuma

Hideo Kikuchi

Masatomo Shigeta

Tomizo Endo

Shoichi Motokawa

Yutaka Sumida

Keiji Nagayama

Hisatoshi Ohwada

Masaichi Ohtake

Seiki Sanada

Toru Kawahara

A closed reactor for the thermal cracking of heavy oils, having an internally mounted, rotatable injection pipe. The injection pipe is adapted to spurt preheated raw material under pressure against the inner wall surfaces of the reactor while rotating to remove coke which has deposited on the reactor walls during the previous cracking operation.

Reactor for the thermal cracking of heavy 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

A method for the batch thermal cracking of heavy oils, such as steam blowing for production of binder pitch, employing a reactor having a rotary injection pipe which is rotatable within the reactor. Upon completion of the thermal cracking and withdrawal of the reaction product, the injection pipe ejects preheated raw material under pressure against the interior wall surfaces of the reactor while in rotation to remove coke which has deposited on the reactor walls during the previous cracking operation.

Method for the thermal cracking of heavy 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.

Method for the thermal cracking of heavy hydrocarbon

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Iwaki, Japan

Masaharu Tomizawa