Sumitomo Chemical Company, Limited

Susumu Kishiwada

Tatsuo Shiraishi

Yoshihiko Nagaoka

Hiroshi Ichihashi

Shinkichi Shimizu

Shigeru Honmaru

Akihiko Atsumi

Shigern Honmaru

A process for production of acrylic acid by the gas phase catalytic oxidation of acrolein with molecular oxygen in the presence of a catalyst, characterized in that the catalyst is a metal oxide catalyst containing as the metal elements Mo, V, Cu and X in a ratio of 12 : 0.1-16 : 0.1-8 : 0.01-12 as the number of atoms (wherein X represents at least one element selected from the group consisting of Fe, Co, Ni and Mg), whereby acrylic acid can be produced at a greatly lowered reaction temperature in a markedly increased yield with an improved perpass yield.

Process for production of acrylic acid

A catalytic process for the preparation of acrolein by the vapor phase oxidation of propylene which comprises contacting propylene and oxygen with a catalyst composition comprising a catalyst system of the formula:

Catalytic process for the preparation of acrolein

A process for the preparation of acrolein by the vapor phase catalytic oxidation of propylene which comprises contacting propylene and oxygen with a catalyst composition comprising a catalyst system of the formula:

A catalytic process for the preparation of acrolein by the vapor phase oxidation of propylene which comprises contacting propylene and oxygen with a catalyst composition comprising a catalyst system of the formula: Mo.sub.a Bi.sub.b Fe.sub.c Ni.sub.d Tl.sub.e P.sub.f X.sub.g Y.sub.h O.sub.i wherein X is one or more of Mg, Mn and Co, Y is one or more of Cu, Ca, Sr, Zn, Cd, Sn and Pb and a, b, c, d, e, f, g, h and i represent respectively the number of atoms, provided that, when a is 12, b is 0.1 to 5, c is 0.1 to 12, d is 0.1 to 12, e is 1 or less but not 0, f is 0 to 5, g is 0 to 12, h is 0.1 to 12 and i is from 36 to 112. By such a process, acrolein is produced in a high selectivity and an excellent yield per each pass even at a large space velocity.

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Niihama, Japan

Susumu Kishiwada