Patent · US Expired

Preparation of bis(4-hydroxyphenyl)sulfone

US5059715A · kind A · utility

1Cited by

3References

8Claims

0Family size

Assignee

BASF SE

Inventors

Michael Stumpp · Deidesheim, DE
Peter Neumann · Wiesloch, DE
Wolfgang Ruehenback · Birkenau, DE
Michael Bergner · Freinsheim, DE

Key dates

Filing date	Mar 14, 1991
Grant date	Oct 22, 1991
Priority date	—
Expiry date	Mar 14, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C315/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of bis(4-hydroxyphenyl)sulfone by reacting phenol with sulfuric acid in the presence of a solvent at from 130.degree. to 220.degree. C. and in the presence or absence of a sulfonating assistant, wherein the bis(4-hydroxyphenyl)sulfone formed is selectively deposited on a nucleating surface during or after the reaction, and thus removed from the reaction medium.

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