Method for extracting vitamin E from vegetable oil deodorization distillate

Abstract

The present invention discloses a method of extracting vitamin E from plant oil deodorized and distilled substance of plant oil. The present invention has the technical proposal that: through crystallization of previously separated crude sterol and molecular distillation of sterol ester, two types of lipase are orderly used respectively to realize the methyl esterification of free fatty and the esterification of triglyceride in deodorized and distilled substance. Then the molecular distillation technology is used to realize the separation of methyl ester and vitamin E in the fatty acid so as to prepare the concentrated vitamin E product. The present invention uses lipase to replace the conventional strong acid and alkali. Two types of lipase are used to replace the methyl esterification of free fatty and the esterification of triglyceride in deodorized and distilled substance. Compared with the prior art, the reaction of the present invention occur in a mild circumstance; the reactionprocess is easy to be controlled, and conducive to the recycling and use of vitamin E. Besides, the operation is relatively simple and has no problems of environmental pollution. The purity of concentrated vitamin E can reach above 30 percent.

Description

(1) Technical field [0001] The invention belongs to the technical field of agricultural product biochemistry, and relates to a method for extracting vitamin E from vegetable oil deodorization distillates. (2) Background technology [0002] Vegetable oil deodorizer distillates (deodorizer distillates) is a mixture of various fractions obtained in the deodorization process of vegetable oil. It mainly contains a large amount of free fatty acids, vitamin E, glycerides and other components. [0003] Natural vitamin E has many important physiological functions such as anti-free radicals, anti-aging, improving the physical immunity of the human body and animals, etc. It has no toxic and side effects on the human body, and its long-term use safety is much higher than that of synthetic vitamin E. Therefore, in the food and nutraceutical industry, natural vitamin E is widely favored. Based on the easy separation of vitamin E and fatty acid monoesters, the free fatty acids and neutra...

AI Technical Summary

Problems solved by technology

However, in the same reaction, the methyl esterification and transesterification of fatty acids and neutral oils will affect each other, and it is difficult to control the reaction process.

Patent CN1693472 combines molecular distillation and lipase technology to convert fatty acids and neutral oils in oils into fatty acid methyl esters, so that the reaction can be carried out under mild conditions, which greatly simplifies the reaction steps and has no environmental pollution. A kind of lipase is developed, the methyl esterification and transesterification of fatty acid and neutral oil will affect each other in the reaction, and there is also the problem that the control of the reaction process is relatively difficult

[0004] In summary, using strong acid and strong base to catalyze esterification and deodorization distillate, and then using high vacuum distillation or supercritical extraction technology to separate vitamin E, this process is relatively mature, but the whole process has many unit operations, labor intensity is high, and environmental pollution is serious

However, when lipase is used to simultaneously catalyze the esterification of fatty acids and neutral oils in the deodorized distillate, there are disadvantages such as difficulty in reaction control.