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1. (WO2018181226) CATALYST AND CATALYST GROUP

Pub. No.:    WO/2018/181226    International Application No.:    PCT/JP2018/012233
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Tue Mar 27 01:59:59 CEST 2018
IPC: B01J 35/02
B01J 23/887
C07C 45/35
C07C 47/22
C07C 51/215
C07C 57/05
C07B 61/00
C07C 45/29
C07C 51/23
Applicants: MITSUBISHI CHEMICAL CORPORATION
三菱ケミカル株式会社
Inventors: TAZAWA Kazuharu
田澤 和治
TANIGUCHI Takanori
谷口 貴紀
NAKAMURA Takuya
中村 拓也
Title: CATALYST AND CATALYST GROUP
Abstract:
The objective of the present invention is to provide a catalyst with which pressure losses and coking are suppressed and with which it is possible to produce a target substance with a high yield, when the catalyst is used to produce the target substance by causing a material to undergo a gas phase catalytic oxidation reaction. The present invention relates to a ring-shaped catalyst which is used when producing a target substance by causing a material to undergo a gas phase catalytic oxidation reaction and which has a straight body portion and a hollow body portion, wherein the length of the straight body portion is less than the length of the hollow body portion, and the catalyst has a concave curve from an end portion of the straight body portion to an end portion of the hollow body portion in at least one end portion of the catalyst.