Nippon Kayaku Co., Ltd

Hideaki Miki

Yoshimasa Seo

Kazuo Shiraishi

Fumio Sakai

Koichi Wada

Akira Iwamoto

Atsusi Sudo

A catalyst for the production of unsaturated aldehyde and unsaturated acid, obtained by loading a catalytically active component on a carrier and calcining the loaded catalyst, characterized by an average particle diameter of the catalyst of 4 to 16 mm, an average particle diameter of the carrier of 3 to 12 mm, a calcining temperature of 520 to 600.degree. C. and an amount of the catalytically active component loaded on the carrier of 5 to 80% by weight �weight of the catalytically active component)/(weight of the catalytically active component+weight of the carrier+weight of a strength improver)!, and a process for producing unsaturated aldehyde and unsaturated acid with the catalyst.

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Yamaguchi-ken, Japan

Hideaki Miki