Process for producing pyromellitic dianhydride and catalyst...

Details Process for producing pyromellitic dianhydride and catalyst... Process for producing pyromellitic dianhydride and catalyst...

B - Operations, Transporting

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252/94, 252/95,

B01J 23/22 (2006.01) B01J 21/06 (2006.01) B01J 23/20 (2006.01) B01J 23/26 (2006.01) B01J 23/28 (2006.01) C07C 51/265 (2006.01) C07D 493/04 (2006.01)

Patent

CA 1332831

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.

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