Catalysts for preparation of aromatic carboxylic anhydrides

Details Catalysts for preparation of aromatic carboxylic anhydrides Catalysts for preparation of aromatic carboxylic anhydrides

1985-10-02

1988-03-01

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549235, 549236, 549248, 549256, 549257, 549258, C07D30789

Patent

active

047287446

ABSTRACT:
In accordance with the process of this invention, an improved catalyst for molecular oxidation of an aromatic hydrocarbon to form the corresponding aromatic carboxylic anhydrides is prepared by the steps of forming a catalyst precursor by depositing on titanium dioxide solids in the anatase form a continuous monolayer amount of at least one source of zirconium dioxide, calcining the thus-formed catalyst precursor under conditions sufficient to convert the zirconium oxide source into the oxide form, depositing upon the calcined catalyst precursor a catalytically effective amount of at least one vanadium compound which is convertible into vanadium oxide upon heating and calcining the vanadium-deposited solids under conditions sufficient to convert the vanadium compound into vanadium oxide.

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S. Matsuda et al., "Titanium Oxide Based Catalysts--A Review", Applied Catalysis, 8 (1983) 149-165.
R. J. H. Clark, Chapter 9, "Oxides, Sulphides and Other Binary Compounds", The Chemistry of Titanium and Vanadium (1968), 266-291.
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