Back to results
US 11,628,425 B2Granted
Catalyst and catalyst group
AssigneeMitsubishi Chemical Corporation
InventorsKazuharu Tazawa, Takanori Taniguchi, Takuya Nakamura
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMitsubishi Chemical Corporation
InventorsKazuharu Tazawa, Takanori Taniguchi, Takuya Nakamura
Estimating the term…
An object of the present invention is to provide a catalyst ensuring that when a gas-phase catalytic oxidation reaction of a material substance is conducted using a catalyst to produce a target substance, the pressure loss and coking are suppressed and the target substance can be produced in high yield. The present invention is related to a ring-shaped catalyst having a straight body part and a hollow body part, which is used when a gas-phase catalytic oxidation reaction of a material substance is conducted to produce a target substance, wherein a length of the straight body part is shorter than a length of the hollow body part and at least at one end part, a region from an end part of the straight body part to an end part of the hollow body part is concavely curved.
A ring-shaped catalyst having a straight body part and a hollow body part, which is used when a gas-phase catalytic oxidation reaction of an olefin or a tertiary butanol is conducted to produce a corresponding unsaturated aldehyde and/or unsaturated carboxylic acid, wherein:
A ring-shaped catalyst having a straight body part and a hollow body part, which is used when gas-phase catalytic oxidation of an unsaturated aldehyde is conducted to produce a corresponding unsaturated carboxylic of an unsaturated aldehyde acid, wherein:
Dependencies are inferred from the claim text.