Long-term operation of a heterogeneously catalyzed gas phase...

Details Long-term operation of a heterogeneously catalyzed gas phase... Long-term operation of a heterogeneously catalyzed gas phase...

2007-05-01

2007-05-01

Puttlitz, Karl (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S532000

Reexamination Certificate

active

10961110

ABSTRACT:
A process for the long-term operation of a two-stage heterogeneously catalyzed gas phase partial oxidation of propene to acrylic acid, in which the temperature of the fixed catalyst beds is increased over the time and the gas phase partial oxidation is interrupted from time to time and an oxygen-containing gas mixture is conducted through the fixed catalyst beds at elevated temperature of the fixed catalyst beds.

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