Alkyl and/or alkenyloligoglycoside preparations having reduced magnesium salt concentrations

US7045494B2 · kind B2 · utility

Assignee

• Cognis Deutschland GmbH & Co. KG · DE

Inventors

• Thomas Albers · Goldkronach, DE
• Karl Schmid · Mettmann, DE
• Rainer Eskuchen · Langenfeld, DE
• Michael Koehler · Mettmann, DE

Key dates

• Filing date: Jun 12, 2002
• Grant date: May 16, 2006
• Expiry date: Jun 22, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07H1/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for making an alkyl and/or alkenyl oligoglycoside preparation having a magnesium salt concentration of less than about 10 ppm involving the steps of: (a) providing an alkyl and/or alkenyl oligoglycoside preparation having an active substance content of from about 10 to 70% by weight, based on the weight of the preparation; (b) providing an acid component; (c) adjusting the pH of the alkyl and/or alkenyl oligoglycoside preparation to from about 4 to 9.5 by combining the acid component with the alkyl and/or alkenyl oligoglycoside preparation to form a pH-modified alkyl and/or alkenyl oligoglycoside preparation; (d) providing a column charged with an ion exchange resin; and (e) purifying the pH-modified alkyl and/or alkenyl oligoglycoside preparation by passing it through the column of step (d) at a viscosity of from about 20 to 6,000 mPas, and at a temperature of from about 20 to 90° C. to form the alkyl and/or alkenyl oligoglycoside preparation having a magnesium salt concentration of less than about 10 ppm.