Catalyst, acrylic acid production method, and catalyst production method
AssigneeMitsubishi Chemical Corporation
InventorsKazuharu Tazawa, Yoshimune Abe, Mitsunobu Ito
Life of this patent
Estimating the term…
Abstract
An object of the present invention is to provide a catalyst ensuring that in the case of causing gas-phase catalytic oxidation of an unsaturated aldehyde and an oxygen-containing gas with use of the catalyst to produce a corresponding unsaturated carboxylic acid, the pressure loss can be kept low and an unsaturated carboxylic acid can be produced with high selectivity. The present invention relates to a ring-shaped or columnar catalyst, which is used at the time of producing a corresponding unsaturated carboxylic acid by causing gas-phase catalytic oxidation of an unsaturated aldehyde and an oxygen-containing gas, wherein the outer peripheral edge part is inclined relative to the center line.
Claims5
A ring-shaped or columnar catalyst, which is used at the time of producing a corresponding unsaturated carboxylic acid by causing gas-phase catalytic oxidation of an unsaturated aldehyde and an oxygen-containing gas, wherein an outer peripheral edge part is inclined relative to a center line,
- a ratio (a/b) of an outside diameter a (mm) to a bottom part diameter b (mm) is 2.3 or more,
- a ratio (a/H) of the outside diameter a (mm) to a straight body part length H (mm) is 1.47 or more, and,
- the straight body part length H (mm) is from 3 to 11 mm.
Dependencies are inferred from the claim text.