Patent · US Active

Method for producing phenolphthalein compound using ionic liquid catalyst composition

US7838689B2 · kind B2 · utility

4Cited by

7References

21Claims

0Family size

Assignee

Sabic Innovative Plastics B.V. · NL

Inventors

Venkata Rama Narayanan Ganapathy Bhotla · Bengaluru, IN
Dwairath Dhar · Sherghati, IN
Gurram Kishan · Bengaluru, IN
Salkod Parameshwar Mallika · Bengaluru, IN

Key dates

Filing date	Sep 29, 2008
Grant date	Nov 23, 2010
Priority date	—
Expiry date	May 21, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B67/0096
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A method for producing a phenolphthalein compound is disclosed, comprising: reacting a phenolic compound of the formula:wherein Ra is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula:wherein Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of an ionic liquid catalyst composition and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula:wherein each Ra is independently a hydrogen or a C1-C12 hydrocarbyl group, and Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the ionic liquid catalyst composition comprises a combination of an ionic liquid and a metal halide wherein the metal is selected from the group consisting of a Group IIB, IIIA, VIII, or IVA metal, and a combination thereof.

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