Nippon Kayaku Kabushiki Kaisha

Shigeo Takenaka

Masanobu Ogawa

Hitoshi Shimizu

Yasuji Kido

Tatsutoshi Shimabara

Kenichiro Yamamoto

The present invention relates to a production of 1,3-butadiene and methacrolein simultaneously by catalytic oxidation of mixed butenes composed of butene-1, cis-2-butene, trans-2-butene (unless otherwise mentioned, these three butenes will referred to as n-butenes hereinafter) and iso-butylene more particularly, this invention relates to a process for preparing 1, 3-butadiene and methacrolein simultaneously in high yields by oxidizing the mixed butenes mainly composed of n-butenes and isobutylene with molecular oxygen at an elevated temperature in the presence of a catalyst having the empirical formula:

Process for preparing 1,3-butadiene and methacrolein simultaneously

The present invention relates to a process for preparing acrylic acid by oxidizing acrolein and to an oxidation catalyst. More particularly, the present invention relates to a catalyst and a process for preparing acrylic acid by oxidizing acrolein or a mixed acrolein gas obtained by vapor phase oxidation of propylene with molecular oxygen in the presence of an oxidation catalyst of the empirical formula:

Process for preparing acrylic acid and oxidation catalyst

The preparation of an oxidation catalyst is described, represented by the following general formula:

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Takasaki, Japan

Shigeo Takenaka