Continuous process for the production of acyloxybenzenesulfonic acids

US4803015A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Werner Wellbrock · Bad Soden am Taunus, DE
• Adolf Studeneer · Kelkheim, DE

Key dates

• Filing date: Oct 23, 1986
• Grant date: Feb 7, 1989
• Expiry date: Oct 23, 2006

Classification

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

Abstract

A process for the continuous production of C.sub.7 -Cl.sub.2 -acyloxybenzenesulfonic acids, wherein phenol and a sulfonating reagent, diluted with an aliphatic C.sub.7 -Cl.sub.2 -carboxylic acid, is charged to the top of a continuous-flow reactor heated to 80.degree.-100.degree. and the mixture of phenolsulfonic acid and the aliphatic carboxylic acid, leaving the bottom end of this continuous-flow reactor, and a chlorinating reagent are charged to the top of a second continuous-flow reactor, nitrogen being passed in counter-current through both continuous-flow reactors.