Process for producing pyromellitic dianhydride

Details Process for producing pyromellitic dianhydride Process for producing pyromellitic dianhydride

1989-02-22

1990-05-15

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30791

Patent

active

049259571

ABSTRACT:
A catalyst comprising an inert support that carries on it vanadium oxide, sodium oxide and molybdenum oxide in predetermined amounts, at least one additional component in a predetermined amount which is selected from among chromium oxide, manganese oxide, niobium oxide and titanium oxide is capable of producing pyromellitic dianhydride in high yield from inexpensive durene over a broad optimal temperature range while suppressing the generation of heat in the catalyst bed.

REFERENCES:
patent: 3227752 (1966-01-01), Olivier et al.
patent: 3464930 (1969-09-01), Friedrichsen et al.
patent: 3799888 (1974-03-01), Suvorov et al.

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