A kind of method for extracting milk thistle oil

Abstract

The invention relates to a method for extracting silybum marianum oil from silybum marianum seeds. By adopting a method of immersing, freeze drying and ultrasonic extraction, the product yield is greatly increased; moreover, the content of unsaturated fatty acid in the oil product reaches more than 50 percent, the loss is basically avoided, and the yield reaches up to more than 95 percent; and moreover, the oil is clear in color, full in fragrance and very suitable for industrialized production. The product can be directly used as healthy edible oil or can be applied to a health product.

Description

technical field [0001] The invention relates to a method for extracting milk thistle oil, more particularly, to a method for extracting milk thistle oil from milk thistle seeds. Background technique [0002] Silybum marianum (Silybum marianum) is a plant native to Western Europe and North Africa. It has no strict requirements on soil and water. It can be planted on sandy land and saline-alkali land. It has strong adaptability. After being introduced to China, it has grown in Shaanxi and Gansu. There are large-scale cultivations in Heilongjiang, Heilongjiang and Hebei provinces, mainly used to extract silymarin. Silymarin is known for its liver-protecting and choleretic effects, and is widely used in the prevention and treatment of cardiovascular and cerebrovascular diseases. However, besides silymarin, milk thistle seeds also contain a large amount of milk thistle oil. On April 16, 2014, the National Health and Family Planning Commission approved milk thistle seed oil as a ...

AI Technical Summary

Problems solved by technology

[0004] At present, the research on the production and preparation of milk thistle oil is still not deep enough. Generally, milk thistle seed is used as raw material, and it is made by direct cold pressing, filtration and other processes.

However, this method only undergoes natural sedimentation and filtration, and the acid value of the oil is high, the cooking process is heavy, the flavor is poor, and the oil yield is low, and the residual oil of the cake is high.

In addition, the water substitution method is used to rupture the cells by soaking, and the water penetrates into the interior of the intact cells to make the gel swell, heat and fry the seeds to make the oil in the cells flow out, and the oil is separated by the oscillation method. Without pressing or solvent, the oil body can flow out completely, and can produce a special fragrance, but the extraction efficiency is not enough, and the whole process takes a long time

There is also solvent extraction, but because most of the solvents that can dissolve oil are toxic organic solvents, the milk thistle oil extracted by this method is usually used as industrial oil, and cannot be eaten

Recently, methods such as carbon dioxide supercritical extraction and water enzymatic wall-breaking extraction have been developed. The separation efficiency is high, but there are still disadvantages such as high cost or long time.