Retention of activity of molybdenum-containing metallic oxide catalyst
AssigneeMitsubishi Rayon Co., Ltd.
InventorsYutaka Sasaki, Kunio Mori, Yoshimi Nakamura, Kazuo Morishita, Ken Ohyachi
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Abstract
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.
Claims3
A method for ammoxidation of propylene, which comprises subjecting propylene, ammonia and oxygen to gas phase fluidized-bed reaction at a temperature ranging from 300 to 500.degree. C. in the presence of a molybdenum-containing oxide catalyst having a molybdenum content of no less than 10% by weight, further comprising:
- (i) bismuth,
- (ii) iron and/or cerium, and
- (iii) tellurium, the atomic ratio of the tellurium to the molybdenum being (0.05-1.5):10.
Dependencies are inferred from the claim text.