Regeneration of vanadium-phosphorus catalyst complex with...

C - Chemistry – Metallurgy – 07 – D

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260/365.7

C07D 307/60 (2006.01) B01J 27/28 (2006.01) C07C 51/215 (2006.01) C07C 51/31 (2006.01)

Patent

CA 1071647

8720 REGENERATION OF PROMOTED VANADIUM-PHOSPHORUS- OXYGEN CATALYST COMPLEXES FOR OXIDATION OF HYDROCARBONS Abstract of the Disclosure Promoted vanadium-phosphorus-oxygen complexes used in the vapor phase oxidation of saturated hydrocarbons to dicarboxylic acid anhydrides, such as maleic anhydride, are regenerated in situ by the periodic or continuous addition of lower alkyl esters of orthophosphoric acid to the feed during the vapor phase oxidation.

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