Process for the production of carboxylic anhydrides

Details Process for the production of carboxylic anhydrides Process for the production of carboxylic anhydrides

1992-10-16

1993-10-12

Konopka, Paul E.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549239, 549248, 549257, 549262, 502202, C07D30789, C07D30760, C07D49302, B01J 2202

Patent

active

052527522

ABSTRACT:
A process for the production of carboxylic anhydrides from aromatic hydrocarbons in gas phase oxidation by using a high activity and high selectivity fluid catalyst, comprising 50 to 95% by weight calculated as TiO.sub.2 +SiO.sub.2 +B.sub.2 O.sub.3 of component (A) which comprises titanium oxide, silicon dioxide and boron oxide and
5 to 50% by weight calculated as V.sub.2 O.sub.5 +M.sub.2 O (M represents an alkali metal) +SO.sub.3 of component (B) comprising vanadium oxide, an alkali metal oxide and sulfuric anhydride, wherein weight ratios of B.sub.2 O.sub.3 to TiO.sub.2 and SiO.sub.2 to TiO.sub.2 in said component (A) are in the range of 0.02 to 0.5 and 0.25 to 1.0, respectively, is provided.

REFERENCES:
patent: 3806469 (1974-04-01), Morris et al.
patent: 3843552 (1974-10-01), Jouy et al.
patent: 4397768 (1983-08-01), Felice
patent: 4912234 (1990-03-01), Cullo

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