Process for the production of pure lecithin directly usable for physiological purposes
AssigneeKali-Chemie Pharma GmbH
InventorsWalter Heigel, Rolf Hueschens
Life of this patent
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Abstract
Disclosed is a process for the production from raw lecithin of pure lecithin directly usable for physiological purposes, comprising the steps of contacting raw lecithin with gas as the extraction medium under supercritical conditions with respect to pressure and temperature in an extraction stage to produce a gas containing an extract; passing the gas containing the extract from the extraction stage into a separation stage; varying at least one of the pressure and the temperature of the gas in the separation stage to separate the extract-containing gas into the gas and the extract; recycling the gas after the step of varying the pressure and/or temperature; and removing pure lecithin from the extraction stage.
Claims18
A process for the production of pure lecithin directly usable for physiological purposes by selective extraction from raw lecithin mixtures with oily substances, said process comprising the steps of:
- contacting said raw lecithin mixture with gas as the extraction medium under supercritical conditions with respect to pressure and temperature in extraction stage to produce a gas containing an extract;
- passing the gas containing the extract from the extraction stage into a separation stage;
- varying at least one of the pressure and the temperature of the gas in the separation stage to separate the extract-containing gas into the gas and the extract;
- recycling the gas after the step of varying the pressure and/or temperature;
- and
- removing pure lecithin from the extraction stage.
Dependencies are inferred from the claim text.