Method for extracting sesamin from sesame oil

Abstract

The invention discloses a method for extracting sesamin from sesame oil. The sesame oil is used as a raw material. The method comprises the steps of performing primary degassing and primary molecular distillation on the sesame oil, centrifuging and precipitating the distillate to separate the sesamin from the sesame oil, and removing grease from the centrifuged and precipitated distillate through supercritical CO2 extraction to obtain a crude sesamin product; finally, crystallizing the crude sesamin product to obtain a sesamin crystal. By adopting the method disclosed by the invention, high-purity sesamin and high-purity sesame oil can be obtained at the same time, the whole extraction process does not cause any harmful substance pollution, the extraction efficiency is high, and the cost is low.

Description

technical field [0001] The invention relates to a method for extracting and purifying sesamin from sesame oil. Background technique [0002] Sesame contains lignan antioxidant substances such as sesamin and sesamolin. Sesamin is usually a needle-like or powdery white solid with a molecular weight of 354.36 and a melting point of 121-123°C. It is insoluble in water, acid and alkali, and easily soluble In acetone, chloroform, ethyl acetate and other organic solvents. In recent years, a lot of research has been done on the physiological functions of sesamin at home and abroad. It is generally believed that sesamin has strong anti-oxidation, liver protection, lowering cholesterol, anti-hypertensive, inhibiting breast cancer and immune activation and other physiological functions. Therefore, people's research on sesamin extraction and purification technology is deepening day by day, and the extraction process is continuously improved to improve extraction efficiency and purity. ...

AI Technical Summary

Problems solved by technology

[0003] At present, sesamin can be extracted from sesame seeds, sesame oil, and sesame cakes. The extraction methods used mainly include solvent extraction, steam vacuum distillation, column adsorption, supercritical CO 2 Extraction and other methods, from the perspective of the overall technology development of sesamin extraction and purification at home and abroad, the current extraction of sesamin in sesame oil is still based on vacuum distillation, organic solvent extraction, and then concentration, recrystallization and other processes. Although such methods can obtain sesamin, there are complex processes in this type of process, the organic solvent is flammable and explosive, and the residual organic solvent in the by-product sesame oil causes problems such as difficulty in reuse, which directly leads to low yield of sesamin and high production cost. Poor product quality; newly developed supercritical CO 2 Extraction technology extracts sesamin, although the process is simple and avoids the use of a large amount of organic solvents, the method has low sesamin yield and high cost, and is difficult to apply on a large scale; chromatography can obtain high-purity sesamin, but the method It will consume a large amount of organic solvent, the process cost is high, and the production capacity is low, and it does not have the prospect of industrial production