Patent number: 5206201
Abstract: A catalyst for the production of a substituted benzaldehyde by catalytic vapor-phase oxidation of a substituted toluene, which catalyst has as a catalytically active substance being composed of an oxide represented by the general formula III:V.sub.a Mo.sub.b X.sub.c Y.sub.d O.sub.e (III)wherein V, Mo, and O are respectively for vanadium, molybdenum, and oxygen, X is at least one element selected from the group consisting of sodium, potassium, rubidium, cesium, and thallium, Y is at least one element selected from the group consisting of niobium, tantalum, phosphorus, antimony, bismuth, tellurium, tin, lead, boron, copper, and silver, and a, b, c, d, and e indicate the atomic ratios of relevant elements such that where a+b=1, then b=0.05 to 0.4, c=0.1 to 1, d=0 to 1, and e=the value determined by the state of oxidation of other elements.
Type:
Grant
Filed:
May 22, 1991
Date of Patent:
April 27, 1993
Assignee:
Nippon Shokubai Co., Ltd.
Inventors:
Nobuji Kishimoto, Isao Nakamura, Taizou Matsueda, Yoshitaka Arita