Catalyst composition for oxidation of olefins
AssigneeDaicel Corporation
InventorsKouzou Sakakibara, Iwao Abe, Takushi Yokoyama, Kazuyuki Matuokadeclare
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Abstract
A catalyst cmposition for the gas phase oxidation of .alpha.,.beta.-unsaturated olefinic hydrocarbons comprising at least two metal oxides, at least one of which contains molybdenum, and a silica carrier having a specific surface area of at least 250 m.sup.2 /g, the catalyst composition as a whole having a specific surface area of from 100 to 250 m.sup.2 /g.
Claims7
In a process for preparing an .alpha.,.beta.-unsaturated aldehyde by the gas phase catalytic oxidation of the corresponding .alpha.,.beta.-unsaturated olefinic hydrocarbon, which comprises contacting a gas phase mixture of said olefinic hydrocarbon and molecular oxygen, with a catalyst composition consisting essentially of a carrier having deposited thereon a mixture of at least two metal oxides, at least one of which is molybdenum oxide in an amount of at least about 25% by weight, based on the total metal oxides, and the other metal oxide or metal oxides also being present in an amount of at least 25% by weight, based on the total metal oxides, the improvement which comprises;
- the carrier of said catalyst composition consists of silica having a specific surface area of 250 m.sup.2 /g up to 700 m.sup.2 /g, the catalyst composition has a specific surface area in the range of from 150 m.sup.2 /g to 200 m.sup.2 /g, and the reaction temperature is in the range of from about 310.degree. to about 340.degree. C.
Dependencies are inferred from the claim text.