Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Phosphorus or compound containing same
Reexamination Certificate
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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Bortinger Arie
Mazzoni Gianluca
Monti Tiziana
Bell Mark L.
Hailey Patricia L.
Long William C.
Lonza S.p.A.
Roberts & Roberts, LLP
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