Nippon Shokubai Kagaku Kogyo Co., Ltd.

Isao Nagai

Michio Ueshima

Noboru Saito

Ritsuo Kitada

Ryuji Aoki

Yoshiyuki Takahashi

Hideaki Tsuneki

Takahisa Sato

Masahiro Takata

Isao Nakamura

Takeshi Satake

Kazuhiro Takatsu

Method for production of substituted benzaldehyde

A catalyst for the vapor-phase oxidation of an unsaturated hydrocarbon, alcohol, saturated aliphatic aldehyde or unsaturated aliphatic aldehyde having 4 carbon atoms, said catalyst comprising a molybdovanadophosphoric acid having X-ray diffraction lines (Cu-K.sub..alpha. radiation) at 2.theta.=about 26.2.degree., about 10.5.degree., about 21.3.degree. and about 30.3.degree. and a crystal structure approximating that of its salt, and said catalyst having the composition represented by the general formula

Process for preparation of methacrylic acid

A catalyst for production of methacrylic acid, said catalyst being molded in a ring-like shape having an outside diameter of 3.0 to 10.0 mm, an inside diameter 0.1 to 0.7 times the outside diameter and a length 0.5 to 2.0 times the outside diameter, said catalyst comprising a catalytically active material having the composition represented by the following general formula

Catalyst for production of methacrylic acid

A catalyst for the production of unsaturated aldehydes is provided which is represented by the general formula

Catalyst for production of unsaturated aldehydes

A catalyst for manufacturing methacrolein by the vapor phase oxidation of isobutylene or tertiary butanol, said catalyst having the composition represented by the following formula

Catalyst for manufacturing methacrolein

Oxidation catalyst

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Suita, Japan

Isao Nagai