Catalyst for production of pyromellitic anhydride and method for

Details Catalyst for production of pyromellitic anhydride and method for Catalyst for production of pyromellitic anhydride and method for

1994-10-21

1997-09-02

Caldarola, Glenn A.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502305, 502308, 502309, 502344, 502350, 502353, B01J 2350, B01J 2322

Patent

active

056631146

ABSTRACT:
A catalyst for obtaining pyromellitic anhydride at a high raw material gas concentration with high yield and a method for the production of pyromellitic anhydride are provided. The catalyst containing vanadium and silver as essential component elements for catalyst and having an atomic ratio of silver to vanadium in the range of from 0.001 to 0.2 allows efficient production of pyromellitic anhydride by the vapor-phase oxidation of a tetraalkylbenzene with a molecular oxygen-containing gas. The method of this invention accomplishes the production of pyromellitic anhydride by the use of the catalyst.

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