Process for the preparation of ether-sulphonates

US5523471A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Klaus Delpy · Dietzenbach, DE
• Fritz Engelhardt · Frankfurt am Main, DE
• Ralf Zerrer · Karlstein, DE
• Dirk Buhring · Suzano, BR

Key dates

• Filing date: Aug 29, 1995
• Grant date: Jun 4, 1996
• Expiry date: Aug 29, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C303/32
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of ether-sulphonates of high purity, substantially free from extraneous salts, of the general formula I EQU R.sup.1 --[O--(CR.sup.2 R.sup.2 R.sup.2' --CR.sup.5 R.sup.5' SO.sub.3 MI in which R.sup.2 to R.sup.5, R.sup.2+ to R.sup.5', M, x and y are defined as given in claim 1 by reacting a compound of the general formula II EQU R.sup.1 --[O--(CR.sup.2 R.sup.2+ --CR.sup.3 R.sup.3').sub.x ].sub.y --OHII with a compound of the general formula III EQU HO--CR.sup.4 R.sup.4' CR.sup.5 R.sup.5' --SO.sub.3 M III in the presence of a compound of the general formula IV EQU MOH IV followed by neutralization of the compound of the general formula IV with an acid, characterized in that the acid employed is a compound of the general formula V EQU R.sup.1 --[O--(CR.sup.2 R.sup.2' --CR.sup.3 R.sup.3').sub.x ].sub.y --OCR.sup.4 R.sup.4' CR.sup.5 R.sup.5' SO.sub.3 H V