A kind of esterification-ultrahigh pressure crystallization separation method of vegetable oil distillate

Abstract

An esterification-ultrahigh pressure crystallization separation method for a distillate of vegetable oil takes the distillate of vegetable oil as a raw material, comprises the various unit processes of esterifying, crystalizing, separating, desolventizing, washing and drying, and is characterized in that: in the esterifying process, concentrated sulfuric acid is taken as a catalyst, and absolute ethyl alcohol and free fatty acid are subject to esterification reaction at the temperature of 80 DEG C for 1 hour; in the crystalizing process, urea and 95% ethyl alcohol are added into an esterifying solution, the mixture is stirred to be dissolved, injected into a soft packaging bag, pumped and sealed, and then put into an ultrahigh pressure container to be processed at the pressure of 100-600MPa for 0.5-1h, then the pressure is released, the bag is unpacked, and the operations of separating, desolventizing, washing and drying are conducted to obtain a product mainly containing unsaturated fatty acid ethyl ester, VE, squalene, phytosterol and neutral oil. According to the method, the recovery rate of VE is equal to or larger than 90%, the recovery rate of phytosterol is equal to or larger than 60%, the recovery rate of squalene is equal to or larger than 70%, the recovery rate of neutral oil is equal to or larger than 90%, and the recovery rate of ethyl linoleate is equal to or larger than 80%.

Description

1. Technical field

[0001] The invention relates to a separation process, in particular to an esterification-ultrahigh pressure crystallization separation method of vegetable oil distillates. 2. Background technology

[0002] Vegetable oil vacuum deodorization distillate (hereinafter referred to as vegetable oil distillate) contains a large amount of VE (vitamin E), squalene, phytosterols, polyunsaturated fatty acids and other functional components, a large amount of neutral oil (grease) and saturated fatty acids, monounsaturated fatty acids, etc. Unsaturated fatty acids; in addition, it also contains impurities such as saturated hydrocarbons, odorous substances, and pigments.

[0003] In order to separate functional components from vegetable oil distillates, free fatty acids, pigments, saturated hydrocarbons, odorous substances and other impurities must be removed.

[0004] There are many methods for separating the functional components of vegetable oil distillates, such as...