Nippon Shokubai Co., Ltd.

Isao Nakamura

Nobuji Kishimoto

Etsushige Matsunami

Yoshitaka Arita

Akira Kurusu

Akiyoshi Nakajima

Atsushi Motoyama

Masashi Hashimoto

Taizou Matsueda

Yusei Nagamura

Kunika Takahashi

A method for preparing methacrylic acid at high selectivities and high yields by catalytically vapor phase oxidizing isobutane is provided. In the method, a catalyst comprising (i) a sparingly water-soluble salt of a hetero poly acid and (ii) a composite oxide containing phosphorus, molybdenum and vanadium is used. Component (i) preferably has the element composition (but excluding oxygen) represented by the general formula A B Mo W V (wherein A is a counter cation, for example cesium, B is the hetero atom of the hetero poly acid, for example silicon, and a, b, c, d and e represent an atomic ratio of the respective elements.), and component (ii) preferably has the element composition represented by the general formula P Mo V X O (wherein X is for example cesium, and p, q, r, s and t represent an atomic ratio of the respective elements.).

Method for preparing methacrylic acid

Catalyst for oxidizing methylbenzenes and method for producing aromatic aldehyde

Method for the preparation of (meth)acrylonitriles

A catalyst for the production of a substituted benzaldehyde by catalytic vapor-phase oxidation of a substituted toluene, which catalyst has as a catalytically active substance being composed of an oxide represented by the general formula III:

Catalyst for production of substituted benzaldehyde and method for

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Ikoma, Japan

Isao Nakamura