Method for separating glycerin from reaction mixtures containing glycerin and fatty acid amides, alkoxylated amides obtained therefrom and the use thereof

US6034257A · kind A · utility

Assignee

• BASF SE

Inventors

• Alfred Oftring · Bad Dürkheim, DE
• Günter Oetter · Bischofswerda, DE
• Richard Baur · Mutterstadt, DE
• Oliver Borzyk · Speyer, DE
• Bernd Burkhart · Mutterstadt, DE
• Christian Ott · Speyer, DE
• Martin aus dem Kahmen · Ludwigshafen, DE

Key dates

• Filing date: Jun 3, 1999
• Grant date: Mar 7, 2000
• Expiry date: Jun 3, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D1/526
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for preparing an alkoxylated amide of the formula (I) EQU R.sup.1 --CO--NR.sup.2 --CHR.sup.3 --CHR.sup.4 --O--(CHR.sup.5 --CHR.sup.6 --O).sub.n --H (I) PA1 (1) glycerides of the fatty acids, specified later on, of the formula (II): EQU R.sup.1 --COOH (II) are reached with amines of the formula (III) EQU HNR.sup.2 R.sup.7 (III) to give amides of the formula (IV) EQU R.sup.1 --CO--NR.sup.2 --R.sup.7 (IV) and glycerol, PA1 (2) then the glycerol which has been formed is separated off by adding of aqueous acid solution to the reaction mixture until it has a pH in the range 1-7, in order to bring about phase separation into a glycerol-containing aqueous phase and an organic phase containing amides of the formula (IV), and separating off the aqueous phase, and PA1 (3) subsequently the amide of the formula (IV) is reacted with ethylene oxide and/or propylene oxide and/or butylene oxide to give alkoxylated amides of the formula (I).