Catalyst for catalytic gas phase oxidation of acrolein and...

Details Catalyst for catalytic gas phase oxidation of acrolein and... Catalyst for catalytic gas phase oxidation of acrolein and...

2007-05-22

2007-05-22

Zucker, Paul A. (Department: 1621)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C562S535000

Reexamination Certificate

active

11052897

ABSTRACT:
There are provided a catalyst for catalytic gas phase oxidation of acrolein with molecular oxygen to produce acrylic acid, the catalyst including molybdenum and vanadium and further including at least one volatile catalyst poison ingredient in an amount of 10 to 100 ppb by mass as measured by ion chromatography; and a process for producing acrylic acid, including a step of carrying out catalytic gas phase oxidation of acrolein with molecular oxygen using the catalyst. The catalyst of the present invention can lower a hot spot temperature and suppress reduction in a reaction efficacy accompanied with thermal degradation, so that the acrolein conversion can stably be kept higher over a long term.

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