Process for producing composite oxide catalyst

Details Process for producing composite oxide catalyst Process for producing composite oxide catalyst

2006-11-07

2006-11-07

Sample, David (Department: 1755)

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

Catalyst or precursor therefor

Inorganic carbon containing

C502S311000, C502S330000, C502S337000, C502S338000, C562S546000, C562S547000

Reexamination Certificate

active

07132384

ABSTRACT:
A process for producing a composite oxide catalyst to be used for gas phase oxidation of an olefin or unsaturated aldehyde with molecular oxygen to produce the corresponding unsaturated aldehyde and/or unsaturated carboxylic acid, which has a uniform constant high performance, in an industrial scale and efficiently and constantly, is presented.The process comprises a step of molding a catalyst component-containing powder and a step of calcining a molded product obtained in the molding step, wherein the molding step is a step wherein graphite particles having an average particle diameter D50of from 10 to 50 μm and having a combustion initiating temperature in a differential thermogravimetric analysis higher by at least 50° C. than the calcination temperature in the next calcination step, are added to the catalyst component-containing powder in an amount of from 0.5 to 10 wt %, based on the powder, followed by molding, and the calcination step is a step wherein the calcination is carried out at a temperature of at least 250° C. and lower by at least 50° C. than the combustion initiating temperature of the graphite particles.

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