Catalytic method for producing phenolphthalein compounds

Details Catalytic method for producing phenolphthalein compounds Catalytic method for producing phenolphthalein compounds

2011-03-29

2011-03-29

Chu, Yong (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S485000

Reexamination Certificate

active

07915430

ABSTRACT:
A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula:wherein R1is a hydrogen or a C1-C12hydrocarbyl group, with a phthalic anhydride compound of the formula:wherein R2is a hydrogen, a C1-C12hydrocarbyl 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:wherein each R1is independently a hydrogen or a C1-C12hydrocarbyl group, and R2is a hydrogen, a C1-C12hydrocarbyl 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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