Catalyst for catalytic gas phase oxidation of acrolein and process for producing acrylic acid by catalytic gas phase oxidation using said catalyst

摘要

Containing molybdenum and vanadium, and ions that are purified by the determined contents by our further comprise a 10 to 100 ppb of at least one volatile catalyst poison ingredient, the catalyst that generate acrylic acid by catalytic gas phase oxidation of the molecular oxygen and the acrolein; And the use of the catalyst is provided a method for producing acrylic acid comprising the step of performing the catalytic gas phase oxidation of acrolein with molecular oxygen. The catalyst of the present invention can lower a hot spot (hot spot) to suppress temperature decrease of reaction efficiency accompanied by thermal degradation, high over a long period of time the acrolein conversion can be kept stable.