Patent · US Expired

Process for the preparation of bis(4-hydroxyphenyl) sulfone

US5072049A · kind A · utility

5Cited by

4References

8Claims

0Family size

Assignee

BASF SE

Inventors

Michael Stumpp · Deidesheim, DE
Peter Neumann · Wiesloch, DE
Bernd Hupfeld · Gifhorn, DE
Helmut Reichelt · Neustadt, DE

Key dates

Filing date	Jan 3, 1990
Grant date	Dec 10, 1991
Priority date	—
Expiry date	Jan 3, 2010

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 at a temperature of from 140.degree. to 230.degree. C., wherein the sulfuric acid is metered in to the phenol only after the reaction temperature has been reached, the phenol and sulfuric acid are used in a molar ratio of from 1:1 to 25:1 and the reaction is carried out in the absence of an inert solvent.

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