Preparation of alkyl glycosides

US5554742A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Wolf · Mannheim, DE
• Alfred Oftring · Bad Dürkheim, DE
• Georg Schuh · Ludwigshafen, DE
• Helmut Wolf · Holzkirchen, DE
• Rudolf Alt · Ludwigshafen, DE
• Hans-Heinrich Bechtolsheimer · Dittelsheim-Heßloch, DE
• Dieter Hertel · Leimen, DE

Key dates

• Filing date: Sep 15, 1994
• Grant date: Sep 10, 1996
• Expiry date: Sep 15, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07H15/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The preparation of alkyl glycosides by reaction of aqueous glycoses having a water content of 10-80% by weight with aliphatic primary alcohols having from 5 to 30 C atoms is described, in which PA1 (a) the alcohols and the glycoses are employed in a molar ratio of 2:1 to 10:1, PA1 (b) 0.1-5% by weight, based on the amount of the glycoses employed, of the acidic form of an anionic surfactant is used as the acidic catalyst having emulsifying properties, PA1 (c) 1-30% by weight, based on the amount of the glycoses employed, of alkyl glycosides is used as a further emulsifier, PA1 (d) the aqueous glycose is preheated to 50.degree.-90.degree. C. and the preheated aqueous solution of the glycose is metered with effective mixing into the reaction mixture of alcohol, acidic catalyst and emulsifier in such a manner that an emulsion is formed, PA1 (e) the reaction is carried out at from 100.degree. to 150.degree. C. and from 10 to 100 mbar, the water introduced into the reaction mixture and the water formed by the reaction being continuously removed by distillation, PA1 (f) after the reaction has ended, the acidic catalyst is neutralized by addition of a base such that the resulting mixture …