Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2011-01-11
2011-01-11
Saeed, Kamal A (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
active
07868190
ABSTRACT:
A method for producing a phenolphthalein compound 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, on a porous support, a calcination product of a heteropolyacid composition.
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Bhotla Venkata Rama Narayanan Ganapathy
Halligudi Shivappa Basappa
Kishan Gurram
Mallika Salkod Parameshwar
Veldurthy Bhaskar
Cantor & Colburn LLP
Rodriguez-Garcia Valerie
Sabic Innovative Plastics IP B.V.
Saeed Kamal A
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