Preparation of alkali metal and alkaline earth metal salts of acyloxybenzenesulfonic acids

US4588531A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolf-Dieter Balzer · Ludwigshafen, DE
• Hans-Heinrich Bechtolsheimer · Dittelsheim-Heßloch, DE
• Karl-Heinz Beyer · Bischofswerda, DE
• Rolf Fikentscher · Ludwigshafen, DE
• Johannes Perner · Neustadt, DE
• Rudi Widder · Leimen, DE
• Helmut Wolf · Holzkirchen, DE

Key dates

• Filing date: Oct 18, 1984
• Grant date: May 13, 1986
• Expiry date: Oct 18, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C309/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Alkali metal and alkaline earth metal salts of acyloxybenzenesulfonic acids of the formula I ##STR1## where R is a saturated or unsaturated alkyl radical of 1 to 17 carbon atoms or is phenyl which is unsubstituted or monosubstituted or disubstituted by alkyl of 1 to 3 carbon atoms, halogen, methoxy or nitro, are prepared by neutralization, by a method in which a liquid acyloxybenzenesulfonic acid of the formula I and an aqueous solution of an alkali metal or alkaline earth metal hydroxide, carbonate or bicarbonate are combined in water, at from 0.degree. to 60.degree. C. and while mixing throughly, so that the pH is kept at from 2.5 to 7.0, and, if desired, the resulting salt is isolated from the aqueous solution in a conventional manner.