Process for the purification of carbohydrate derivatives with surface-active properties
AssigneeSKW Trostberg Aktiengesellschaft
InventorsJurgen Heidlas, Jan Cully
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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.
Claims14
A process for the purification of a carbohydrate derivative with surface-active properties, comprising:
- extracting a starting material containing the carbohydrate derivative and impurities with an extraction medium comprising compressed propane or mixtures thereof containing up to 25% by weight butane at pressures between 8 and 150 bar and a temperature of less than 120.degree. C. whereby the impurities are separated from the carbohydrate derivative.
Dependencies are inferred from the claim text.