Catalytic method for producing phenolphthalein compounds
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United States of America Patent
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Mar 29, 2011
Grant Date -
Apr 1, 2010
app pub date -
Sep 29, 2008
filing date -
Sep 29, 2008
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Abstract
A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula:hydrocarbyl group, with a phthalic anhydride compound of the formula:hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula:hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises a metal oxide composition in combination with a porous support, wherein the metal is molybdenum, tungsten, or a combination comprising at least one of the foregoing metals.
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