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Title:
PURIFICATION OF CARBOHYDRATE DERIVATIVE HAVING SURFACE-ACTIVE ACTION
Document Type and Number:
Japanese Patent JPH08245674
Kind Code:
A
Abstract:

To economically obtain high-purity purified carbohydrate derivative under mild conditions by extracting a starting substance containing a carbohydrate derivative having surface-active action and impurities under specific conditions by using the compressed propane gas.

A starting substance containing a carbohydrate derivative having surface-active action and impurities is extracted with compressed propane or a mixture of the compressed propane with ≤25 wt.% butane at ≤120°C under 8-150 bar pressure. Thereby, impurities are dissolved in the compressed gas and separated from the carbohydrate derivative. When the starting substance is a substance having fluidity or liquid, it is preferable that the starting substance is extracted by counter-current principle using a separating column and the carbohydrate derivative is accumulated in a column bottom part and the impurities are discharged from a column top part. Specifically, a 12-18C isolated fatty alcohol which is impurity is separated and removed from an alkyl polyglycoside by using raising liquefied propane.


Inventors:
YUURUGEN HAITORASU
YAN KURII
Application Number:
JP1902496A
Publication Date:
September 24, 1996
Filing Date:
February 05, 1996
Export Citation:
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Assignee:
SUEDDEUTSCHE KALKSTICKSTOFF
International Classes:
C07H1/06; C07H15/04; C11B1/10; (IPC1-7): C07H1/06; C07H15/04
Attorney, Agent or Firm:
Toshio Yano (2 outside)