Mitsubishi Rayon Company, Limited

Nitto Chemical Industry Co., Ltd.

Kazuo Morishita

Yutaka Sasaki

Hiroshi Utsumi

Masato Otani

Yoshimi Nakamura

Kunio Mori

Kenichi Miyaki

Akimitsu Morii

Ken Ohyachi

Process for preparing carbocyclic or heterocyclic nitriles by vapor phase ammoxidation

In the gas phase oxidation of an organic compound, using a metallic oxide fluidized-bed catalyst that contains molybdenum in an amount of 10% by weight or more, bismuth, and at least an element selected from the group consisting of iron and cerium, when tellurium is incorporated into this catalyst in such an amount that the atomic ratio of the tellurium to the molybdenum is (0.05-1.5):10, the catalytic activity can be retained for a prolonged period of time, and, at the same time, the loss of molybdenum and tellurium can be prevented during the oxidation reaction.

Retention of activity of molybdenum-containing metallic oxide catalyst

A process for producing prussic acid by subjecting methanol to a gas-phase contact reaction with molecular oxygen and ammonia in the presence of a catalyst, wherein said catalyst is an oxide composition containing iron, antimony, phosphorus and vanadium with a content of vanadium content being at least 0.6 in terms of atomic ratio relative to iron content taken as 10, and a mixed raw material gas for the gas-phase contact reaction contains oxygen at an oxygen-to-methanol molar ratio of less than 1.6.

Process for production of prussic acid

An iron-antimony-phosphorus-containing metal oxide catalyst for the catalytic oxidation, comprising a crystalline iron antimonate, the catalyst being represented by the following empirical formula:

Iron-antimony-phosphorus-containing metal oxide catalyst for oxidation

A process for preparing a metal oxide catalyst for a fluidized bed process, which comprises adjusting the pH of an aqueous slurry containing an iron compound, an antimony compound, a phosphorus compound, and a silica carrier material as essential elements, with the atomic ratio of phosphorus to antimony being at least 0.1:1, to a pH of 3 or less, spray drying the slurry, and calcining the resulting particles; which catalyst exhibits excellent activity and physical properties suitable for use in a fluidized bed process and can be obtained with good reproducibility.

Process for preparing iron-antimony-phosphorus-containing catalyst for

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Yokohama, Japan

Kazuo Morishita