Method for producing phenolphthalein using heteropolyacid catalyst
A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula (I): wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula (II): wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the pre...
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| creator | HALLIGUDI SHIVAPPA BASAPPA MALLIKA SALKOD PARAMESHWAR VELDURTHY BHASKAR BHOTLA VENKATA RAMA NARAYANAN KISHAN GURRAM |
| description | A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula (I): wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula (II): wherein R2 is a hydrogen, a C1-C12 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 (III): wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group; and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises, on a porous support, a calcination product of a heteropolyacid composition. |
| format | Patent |
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| title | Method for producing phenolphthalein using heteropolyacid catalyst |
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