Process for catalytic vapor phase oxidation

Details Process for catalytic vapor phase oxidation Process for catalytic vapor phase oxidation

2006-10-10

2006-10-10

Barts, Samuel A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S532000

Reexamination Certificate

active

07119227

ABSTRACT:
The present invention provides a process for catalytic vapor phase oxidation which prevents runaway reaction or early deterioration of a catalyst, in the production of (meth)acrylic acid or the like from propylene or isobutylene by the catalytic vapor phase oxidation process using a multi-tubular reactor, which can lead to the production thereof constantly in high yield for a long period of time. Further, the present invention provides a process for catalytic vapor phase oxidation wherein raw material gas is introduced for oxidation into reaction tubes of a multi-tubular reactor which is equipped with, as arranged within the shell of the reactor, a plurality of reaction tubes having a catalyst packed therein and a plurality of baffle plates for changing the direction of the flow of a heating medium introduced into the shell, characterized in that the temperature of the catalyst packed in a reaction tube which is not connected with at least one baffle plate is measured at plural points in the direction of an axis of the reaction tube.

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patent: 10-309457 (1998-11-01), None
patent: WO 01/42184 (2001-06-01), None

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