Method for picking up saponin of tea

Abstract

This invention discloses a method for extracting tea saponin by using tea dreg as the raw material and anhydrous methanol as the solvent. The method comprises: (1) pulverizing tea dreg; (2) placing in an immersing tank; (3) introducing 3 times of anhydrous methanol into the immersing tank from the bottom, and continuously extracting by reverse-cycling for 3 h; (4) removing the immersed solution from the bottom, filtering and introducing into an enamel reactor with a jacket; (5) adding 1 / 3 of ethyl ether to the reactor to obtain white precipitate of tea saponin; (6) sucking the supernatant from the reactor with an intubator in vacuum, and drying the precipitate in the reactor at 0-50 deg.C to obtain the final product. The method can extract tea saponin at a low temperature, thus preserving the active components of tea saponin. The obtain tea saponin has unchanged molecular structure and active components. Besides, the color is whit, and the color transfer problem can be avoided.

Description

technical field [0001] The invention belongs to an extraction method of a chemical mixture, in particular to an extraction method of tea saponin. Background technique [0002] Tea saponin is a fine columnar crystal existing in tea seed dregs. Its melting point is 223-224°C. It tastes bitter and pungent. It is easily soluble in polar solvents such as aqueous methanol and aqueous ethanol, and insoluble in non-polar solvents. . [0003] In medicine, it is mainly used as an anti-osmotic and anti-inflammatory agent, which can relieve phlegm and cough, diuresis, anti-inflammation and anti-edema; in industry, as a good natural surfactant, it can be used to make water-oil emulsion, foaming agent, detergent, and shampoo etc.; it can be used as insecticide and pesticide emulsifier in the pesticide industry. [0004] The wide use of tea saponin makes people pay more and more attention to the research and utilization of tea saponin. At present, the process route for extracting tea sa...

AI Technical Summary

Problems solved by technology

[0005] This extraction method has defects: because tea saponin is formed by ligands, sugar bodies and organic acids, it has a complex structure. Due to the presence of sugar bodies, it is easily oxidized into brown-red under the action of concentrated high temperature. Therefore, although the daily-use products produced by the tea saponin produced by this method, such as shampoo and detergent, have excellent washing performance, there is a staining problem of tea saponin in the fabric after washing, which is not recognized by the market. The application of pesticide emulsifiers is also affected by the problem of color

Its defect is: when water is used as a solvent, impurities such as sugar, protein, and starch will appear. Therefore, there must be a process of sedimentation separation, separation, pre-filtration, and pressure filtration to remove impurities in the steps; The effective activity of saponin is damaged, thereby affecting product performance