Method for directly extracting tea saponin from tea seeds

Abstract

The invention relates to a method for extracting tea saponin directly from tea seeds. The method comprises the following steps: firstly, the oil-tea camellia seeds are hulled, tea kernels are crushed into 200-300 meshes of particles; then, the leaching is carried out, the PH value of the leaching solution is controlled between 5 and 9, the leaching solution is added with organic solution, the amount of the organic solution is determined according to the weight-to-volume ratio (3-8 times) between the oil-tea camellia seeds and the organic solution, the temperature is controlled between 60-80 DEG C, the extraction time is 1-4 hours, and the lixiviation is repeatedly performed for 1-2 times; then, the separation and the solvent recovery are carried out, the filtering or the centrifugal separation is performed to the leaching solution, and meanwhile, the reduced pressure evaporation and the recovery are performed to the organic solvent in the leaching solution to obtain aqueous solution of the tea saponin; and finally, the water is removed from the liquid tea saponin to obtain the crude tea saponin product. The invention has the advantages that the oil-tea camellia seeds are directly taken as the raw materials for extracting the tea saponin, the extract of the obtained tea saponin has high purity and good quality, and the method is suitable for the industrial large-scale production.

Description

【Technical field】 [0001] The invention belongs to the technical field of deep processing of agricultural and forest by-products, and relates to a method for directly extracting tea saponin from tea seeds. 【Background technique】 [0002] Camellia oleifera is a camellia plant of the Camellia oleifera Abel family. It is mainly produced in my country and is concentrated in the south and southwest of my country. According to incomplete statistics, my country produces more than 600,000 tons of camellia seed per year, about 150,000 tons of camellia oil and about 500,000 tons of camellia seed cake. Camellia oleifera seed cake contains 10-20% tea saponin. Tea saponin is a pentacyclic and three-layer substance with hydrophilic sugar body and hydrophobic saponin. It is a natural non-ionic surfactant with emulsifying, dispersing, moisturizing, foaming and other surface activities. It has anti-osmosis, anti-inflammatory, analgesic and other pharmacological functions, and has the functi...

AI Technical Summary

Problems solved by technology

[0003] At present, many articles and patents have disclosed methods for extracting tea saponin from camellia seed cake, mainly including water extraction and organic solvent extraction. Although these processes have made great progress, the tea soap obtained The quality of vegetarian products can not meet the requirements of the market

The quality of tea saponin product is not only related to the extraction method, but also related to the quality of raw materials for extracting tea saponin. Extracting tea saponin from camellia seed cake after extracting camellia oil will bring great harm to the product quality (color, purity, etc.). Adverse effects, such as darker color and lower purity, thus complicating the subsequent processing of the product, such as the need for impurity removal and decolorization treatment, etc., which will affect the activity of tea saponin itself and the yield of the product

Images