[Desacidification des huiles et des corps gras d' origine biologique par des solutions aqueuses d' amines tertiaires].
2001
Peter S. | Drescher M. | Koenig W. | Weidner E.
Deacidification of triacylglycerols by extraction is investigated using aqueous solutions of amines as extractants. Tertiary amines with boiling points ranging between 100 degrees C and 170 degrees C, such as 2-methylamino-diethanol, 2-dimethylamino-ethanol, 4-methylmorpholine, 1-dimethylamino-2-propanol etc. were found to be suitable substances. Especially the deacidification by aqueous solutions of 2-dimethylamino-ethanol (DMAE) was amply investigated as it is used as an active agent in remedies. Amazingly gelatinous soap stocks are not formed, when the concentration of DMAE exceeds 20 / if the free fatty acid content of the oil is below 15 /. Two liquid phases are formed in systems composed of triacylglyceroles and aqueous solutions containing 20 to 80 / DMAE. Palm oil containing 4.3 wt./ free fatty acids was mixed with an equal amount of an aqueous solution of 30 wt./ DMAE at 60 degrees C. In equilibrium an extract containing 86 wt./ free fatty acids (solvents deducted) and a raffinate of 0.09 wt./ free fatty acids are obtained. Loss of neutral oil being 0.7 wt.
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