Nippon Kayaku Kabushiki Kaisha

Motohiko Sugiyama

Ryota Hiraoka

Tomoyuki Kawamura

Tatsuhiko Kurakami

Kimito Okumura

Yuuta Nakazawa

Toru Kawaguchi

Yumi Hino

Hiroki Motomura

Provided is a catalyst for manufacturing an unsaturated aldehyde and/or an unsaturated carboxylic acid, which is prepared by a method in which a molybdenum component raw material is composed of only an ammonium molybdate, the weight of water for dissolution is 8.5 times or less relative to the weight of molybdenum contained in the ammonium molybdate; and a bismuth component raw material is composed of only bismuth nitrate, the weight of a nitric acid aqueous solution for dissolution is 2.3 times or more relative to the weight of bismuth contained in the bismuth nitrate, and a nitric acid concentration in the nitric acid aqueous solution for dissolving the bismuth nitrate is 10% by weight or more.

Catalyst for manufacturing unsaturated aldehyde and/or unsaturated carboxylic acid and manufacturing method of same, and manufacturing method of unsaturated aldehyde and/or unsaturated carboxylic acid

Provided is a method of subjecting an alkene to partial oxidation by using a fixed bed multitubular reactor, thereby producing an unsaturated aldehyde and/or an unsaturated carboxylic acid each corresponding to the alkene, wherein a plurality of catalyst layers formed by N division (N is N&#x2267;2) with respect to a gas flow direction of a reaction tube are provided, and when a change (&#xb0; C.) of hot spot temperature per 1&#xb0; C. change of reaction bath temperature in the catalyst layer is designated as Sn, at least one of the plurality of catalyst layers is regulated to Sn&#x2266;6.

Method for producing unsaturated aldehyde and/or unsaturated carboxylic acid

There is provided a process for producing a shaped catalyst for a fixed bed oxidation reaction or a fixed bed oxidative dehydrogenation reaction, the catalyst having both of sufficient mechanical strength and catalyst performance, and the catalyst is produced by supporting a catalyst powder containing a complex metal oxide having molybdenum as an essential ingredient on an inert support by a tumbling granulation method at a relative centrifugal force of 1 to 35 G.

Process for producing shaped catalyst and process for producing diene or unsaturated aldehyde and/or unsaturated carboxylic acid using the shaped catalyst

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Yamaguchi, Japan

Motohiko Sugiyama