Mitsubishi Chemical Corporation

Mitsubishi Chemical Industries Limited

Mitsubishi Chemical Coporation

Tatsuya Ihara

Kazunori Oshima

Itaru Sawaki

Yasuyuki Yamauchi

Takashi Ushikubo

Masakatsu Hatano

Hideo Suwa

Yoshiaki Iizuka

Yasunori Ishimura

Atsushi Kayou

Hiroyuki Amatsu

Kenichi Kiyono

Mamoru Sawano

Process for the production of maleic anhydride

Process for the simultaneous preparation of acrylonitrile and arcylic

A process for producing maleic anhydride is described, which comprises (i) reacting a hydrocarbon with oxygen in a vapor phase in the presence of a catalyst to yield a reaction mixture gas containing maleic anhydride, (ii) bringing the reaction mixture gas into contact with an organic solvent to collect the maleic anhydride in the organic solvent, (iii) separating at least part of the maleic anhydride from the organic solvent, (iv) washing with an aqueous alkali solution at least part of the organic solvent from which maleic anhydride has been separated, and (v) reusing the resultant washed organic solvent and the residual organic solvent for contact with the reaction mixture gas.

Process for producing maleic anhydride

A method for producing a nitrile by a gas phase catalytic oxidation reaction of an alkane with ammonia in the presence of a catalyst, which comprises supplying the alkane and ammonia to an upper stream inlet of the catalyst layer, and separately supplying at least a part of the total amount of ammonia to a downstream position of the catalyst layer located downstream from the upper stream inlet of the catalyst layer.

Method for producing a nitrile

A catalystic composition suitable for producing acrylonitrile from propylene, ammonia and oxygen (or oxygen-containing gas), which composition is represented by the following formula:

Catalytic composition

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Okayama, Japan

Tatsuya Ihara