Process for the production of maleic anhydride

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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549260, C07D30760

Patent

active

045968780

ABSTRACT:
The useful life of vanadium-phosphorus-oxygen (PVO) catalyst in fixed bed reactors can be substantially extended by treatment with a phosphorus compound followed by steam treatment. The PVO catalysts may be treated with steam after long periods (months) of only phosphorus compound treatment and the benefit of the present invention obtained or the phosphorus and steam treatments may be of only a few hours duration and sequential. In extending the useful life of the PVO catalyst according to the present invention, the temperature profile in the catalyst bed is restored to substantially the same profile as the fresh catalyst.

REFERENCES:
patent: 3296282 (1967-01-01), Kerr
patent: 4020174 (1977-04-01), Partenheimer
patent: 4094816 (1978-06-01), Partenheimer

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