Phosphorus/vanadium catalyst preparation

Details Phosphorus/vanadium catalyst preparation Phosphorus/vanadium catalyst preparation

2005-02-22

2005-02-22

Bell, Mark L. (Department: 1755)

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

Catalyst or precursor therefor

Phosphorus or compound containing same

C502S208000, C502S210000, C502S211000, C502S212000, C502S213000, C502S214000

Reexamination Certificate

active

06858561

ABSTRACT:
A process for preparing a catalyst for maleic anhydride production wherein a +5 vanadium compound such as V2O5, an anhydrous phosphoric acid, and optionally promoters are admixed in an organic alcohol solvent, the admixture is rapidly brought to reflux and thereafter refluxed to reduced the vanadium compound to the desired degree, the reflux mixture is cooled, precursor crystals are separated by filtration and then dried and calcined.

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