Preparation of a pure dialkylaminoethanol stable against discoloration

US5663444A · kind A · utility

Assignee

• BASF SE

Inventors

• Johann-Peter Melder · Schifferstadt, DE
• Gunther Ruider · Monsheim, DE
• Tom Witzel · Ludwigshafen, DE
• Karl-Heinz Ross · Grünstadt, DE
• Gunter Boettger · Bad Dürkheim, DE

Key dates

• Filing date: Jun 30, 1995
• Grant date: Sep 2, 1997
• Expiry date: Jun 30, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C213/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of a color-stable dialkylaminoethanol of the formula ##STR1## in which R.sup.1 and R.sup.2 independently are C.sub.1 -C.sub.20 -alkyl, by reacting ethylene oxide with a dialkylamine of the formula HNR.sup.1 R.sup.2, in which R.sup.1 and R.sup.2 have the same meaning, in the presence of from 2.5 to 50% by weight of water, based on the reaction mixture, at a temperature of from 95.degree. to 170.degree. C., and separating off the water and high-boiling constituents by distillation under a reduced pressure and at a temperature of from 40.degree. to 90.degree. C. at the column bottom.