Patent · US Expired

Process for the preparation of acyloxybenzenesulfonic acids and salts thereof

US4778629A · kind A · utility

6Cited by

3References

14Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Fritz-Feo Grabley · Königstein, DE
Gerd Reinhardt · Kelkheim, DE
Georg Bader · Birkenhard, DE
Walter Rupp

Key dates

Filing date	Oct 23, 1986
Grant date	Oct 18, 1988
Priority date	—
Expiry date	Oct 23, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C309/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of acyloxybenzenesulfonic acids and salts thereof, of the formula ##STR1## in which R is C.sub.1 -C.sub.17 -alkyl or C.sub.2 -C.sub.17 -alkenyl and M is an alkali or alkaline earth metal, ammonium or hydrogen, including the stages of (a) sulfonation of phenol, if appropriate (b) thermal treatment of the sulfonated phenol, (c) esterification of the sulfonated phenol and if appropriate (d) neutralization of the ester, wherein the sulfonation of the phenol is carried out with sulfuric acid or oleum and the water of reaction is removed during or after stage (b) by distillation and/or by reaction with a dehydrating agent.

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