Process for the production of maleic anhydride
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United States of America Patent
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Jun 24, 1986
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N/A
app pub date -
Aug 29, 1984
filing date -
Dec 14, 1983
priority date (Note) -
Expired
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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.
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