Catalyst for preparation of unsaturated aldehyde and unsaturated carboxylic acid
AssigneeNippon Shokubai Co., Ltd.
InventorsHiroto Kasuga, Eiichi Shiraishi
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Abstract
A catalyst suited for catalytic vapor-phase oxidation of isobutylene, t-butanol or propylene to produce respectively corresponding unsaturated aldehyde and unsaturated carboxylic acid is provided. Said catalyst consists of ring-formed shaped bodies composed of (i) a catalyst composition containing at least molybdenum and bismuth as the active ingredients and (ii) inorganic fibers. The catalyst excels in mechanical strength, can give the object products at high yield and shows little activity degradation with time.
Claims7
A catalyst for preparation of unsaturated aldehyde and unsaturated carboxylic acid, which is characterized in that it is in the form of ring-shaped bodies composed of a catalyst composition containing at least molybdenum and bismuth as the active ingredients and inorganic fibers in which the inorganic fibers are at least one selected from glass fibers, alumina fibers, silica fibers and carbon fibers, and have an average fiber length of from 50 μm to 1.5 mm and an average fiber diameter of from 2 μm to 20 μm.
Dependencies are inferred from the claim text.