Oxidation of alkanes to dicarboxylic acid anhydrides using...

Details Oxidation of alkanes to dicarboxylic acid anhydrides using... Oxidation of alkanes to dicarboxylic acid anhydrides using...

C - Chemistry, Metallurgy

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C07D 307/60 (2006.01) B01J 23/22 (2006.01) B01J 37/28 (2006.01) C07C 51/215 (2006.01) C07C 51/25 (2006.01) C07C 51/31 (2006.01)

Patent

CA 1049540

OXIDATION OF ALKANES TO DICARBOXYLIC ACID ANHYDRIDES USING PROMOTED VANADIUM- PHOSPHORUS CATALYST ABSTRACT OF THE DISCLOSURE There is provided an improved process for the vapor phase oxidation of alkanes to dicarboxylic acid- anhydrides, particularly butane to maleic anhydride, which comprises using a vanadium-phosphorus-oxygen complex catalyst having a P/V atomic ratio of 0.5-2, promoted or modified with certain transition metals, preferably chromium, iron, or hafnium. Using these catalysts, the oxidation process can be carried out at lower temperatures and increased yield as compared to the unpromoted complex.

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