Process for the purification of carbohydrate derivatives with surface-active properties

US5703228A · kind A · utility

Assignee

• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Jurgen Heidlas · Trostberg, DE
• Jan Cully · Garching bei München, DE

Key dates

• Filing date: Feb 8, 1996
• Grant date: Dec 30, 1997
• Expiry date: Feb 8, 2016

Classification

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

Abstract

A process is described for the purification of carbohydrate derivatives with surface-active properties in which an extraction process is used to liberate the solid or liquid starting material from undesired lipophilic by-products by the use of compressed propane or a proportionate mixture thereof with butane at pressures between 8 and 150 bar and a process temperature below 120.degree. C. In this way it is possible to isolate valuable raw materials in a gentle manner either batch-wise or continuously which meet the high purity requirements, for example in the field of cosmetics.