Phosphorus addition process for improvement of catalysts...

Details Phosphorus addition process for improvement of catalysts... Phosphorus addition process for improvement of catalysts...

2006-05-01

2009-12-08

Hailey, Patricia L (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

C502S209000, C502S210000, C502S211000, C502S212000, C549S259000, C549S260000

Reexamination Certificate

active

07629286

ABSTRACT:
A process is disclosed for the improvement of fluid bed vanadium phosphorus mixed oxide catalyst performance in the manufacture of maleic anhydride from butane, which process comprises impregnating the VPO catalyst powder with a phosphorus compound, such as an alkyl ester of orthophosphoric acid and then using this impregnated catalyst powder to provide phosphorus to the maleic anhydride producing catalyst.

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