Patent · US Active

Method for producing phenolphthalein using a heteropolyacid catalyst

US7868190B2 · kind B2 · utility

3Cited by

7References

20Claims

0Family size

Assignee

Sabic Innovative Plastics B.V. · NL

Inventors

Venkata Rama Narayanan Ganapathy Bhotla · Bengaluru, IN
Shivappa Basappa Halligudi · Mangaon, IN
Gurram Kishan · Bengaluru, IN
Salkod Parameshwar Mallika · Bengaluru, IN
Bhaskar Veldurthy · Savanuru, IN

Key dates

Filing date	Sep 29, 2008
Grant date	Jan 11, 2011
Priority date	—
Expiry date	Jul 4, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D307/885
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula:wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: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: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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.