Process for preparing blown vegetable oil

Details Process for preparing blown vegetable oil Process for preparing blown vegetable oil

C - Chemistry, Metallurgy

11

B

C11B 3/16 (2006.01) C11B 3/00 (2006.01)

Patent

CA 2400925

A method for partially refining a crude vegetable oil utilizing physical refining techniques is described. The crude vegetable oil is first degummed by either (1) allowing the crude oil to settle over a period of time, such as twenty days, so that the oil becomes stratified into at least two layers, wherein one layer comprises gums with low oil content and a second layer comprises oil containing only a fraction of the gums originally present and then separating the oil layer from the gum layer, or (2) heating the crude oil to a temperature of about 270-300°F with agitation and then allowing the crude oil to settle for a period of time until the oil becomes stratified into the at least two layers. The degummed oil is then aerated and agitated while being maintained at a temperature of 170-180°F for a time period sufficient to obtain a desired oil viscosity. The resulting partially refined oil is suitable for use in industrial applications such as the preparation of urethane foams.

L'invention concerne un procédé permettant de raffiner partiellement une huile végétale brute en faisant appel à des techniques de raffinage physiques. Pour démucilaginer l'huile végétale brute, (1) soit on la laisse se déposer pendant un certain temps, par exemple vingt jours, de sorte qu'elle se stratifie en au moins deux couches, l'une comprenant des mucilages à faible teneur en huile et l'autre comprenant de l'huile ne contenant qu'une fraction des mucilages présents à l'origine, puis on sépare la couche d'huile de la couche de mucilage, (2) soit on chauffe l'huile brute à une température d'environ 270-300 DEG F tout en l'agitant, puis on la laisse se déposer pendant un certain temps jusqu'à ce qu'elle se stratifie en au moins les deux couches. Puis on aère et on agite l'huile démucilaginée tout en la maintenant à une température de 70-180 DEG F suffisamment longtemps pour obtenir une viscosité voulue. L'huile partiellement raffinée ainsi obtenue convient à des applications industrielles telles que la préparation de mousses d'uréthanne.

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