Process for the manufacture of maleic anhydride utilizing catalysts reactivated with alkyl esters of orthophosphoric acid in the presence of water
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United States of America Patent
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Mar 10, 1987
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N/A
app pub date -
Feb 27, 1985
filing date -
Apr 14, 1983
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Expired
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Abstract
A process for the reactivation of a vanadium-phosphorus-oxygen catalyst promoted by metals selected from the group consisting of zinc, molybdenum, niobium, tungsten, uranium, cobalt and tin with alkyl esters of phosphoric acid and water is disclosed. The catalysts are useful for the manufacture of maleic anhydride from butane, butene, butadiene or benzene feedstock.
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