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Method for extracting tea saponin from dregs of tea seedcakes

A technology of tea seed cake and tea saponin, which is applied in chemical instruments and methods, preparation of sugar derivatives, steroids, etc., can solve the problems of high purity, too simple process steps, difficult tea saponin, etc., and achieve High purity and good product texture

Inactive Publication Date: 2012-05-16
曾科
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many extraction methods of tea saponin, such as: water preparation method, organic solvent extraction method, flocculant precipitation method, etc., but these methods have many shortcomings, and it is difficult to make tea saponin meet the requirements of good texture, colorless and high purity.
[0006] The application number is 200910037987.3, and the invention patent titled "Method for Extracting Tea Saponin Directly from Tea Seeds" provides a method for directly extracting tea saponin from tea seeds, including extraction, separation, solvent recovery, and water removal. and other operations, the process steps of the invention are too simple to effectively and rapidly extract tea saponin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A. The tea seeds are crushed into 200 mesh tea seed meal, soaked in methanol for 1 hour, and heated to reflux; the mass ratio of the methanol to the tea seed meal is 2:1, the heating reflux temperature is 45°C, and the reflux is 2h;

[0020] B. Extract with petroleum ether after filtration, and concentrate the filtrate on a rotary evaporator at 50°C to a brown-red liquid;

[0021] C. Take the brown-red liquid out of the macroporous adsorption column, wash it with 65% methanol by volume to light yellow, then wash with 2% dilute hydrochloric acid until colorless, and finally eluted with desorbent; Said desorbent is petroleum ether;

[0022] D. Concentrate the eluent by distillation under reduced pressure, and then vacuum dry for 3 hours to obtain off-white tea saponin.

[0023] The yield of tea saponin obtained was 98%.

Embodiment 2

[0025] A. The tea seeds are crushed into 300 mesh tea seed meal, soaked in methanol for 3 hours, and heated to reflux; the mass ratio of the methanol to the tea seed meal is 4:1, the heating reflux temperature is 55°C, and the reflux is 4 hours;

[0026] B. Extract with petroleum ether after filtration, and concentrate the filtrate on a rotary evaporator at 70°C to a brown-red liquid;

[0027] C. Take the brown-red liquid out of the macroporous adsorption column, wash it with 65% methanol by volume to light yellow, then wash it with 5% dilute hydrochloric acid until it is colorless, and finally eluted with desorbent; The desorbent is n-hexane;

[0028] D. Concentrate the eluate by distillation under reduced pressure, and then vacuum dry for 5 hours to obtain off-white tea saponin.

[0029] The yield of the obtained tea saponin was 95%.

Embodiment 3

[0031] A. Crush the tea seeds into 220 mesh tea seed meal, soak in methanol for 1.5 hours, and heat to reflux; the mass ratio of the methanol to the tea seed meal is 2.5:1, the heating reflux temperature is 47°C, and the reflux is 3h;

[0032] B. Extract with petroleum ether after filtration, and concentrate the filtrate on a rotary evaporator at 55°C to a brown-red liquid;

[0033] C. Take the brown-red liquid out of the macroporous adsorption column, wash with 65% methanol by volume to light yellow, then wash with 3% dilute hydrochloric acid until colorless, and finally eluted with desorbent; Said desorbent is isopropanol;

[0034] D. Concentrate the eluent by distillation under reduced pressure, and then vacuum dry for 3.5 hours to obtain off-white tea saponin.

[0035] The yield of the obtained tea saponin was 94%.

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Abstract

The invention relates to a method for extracting tea saponin from the dregs of tea seedcakes. According to the invention, the tea saponin is extracted by macroporous adsorption resin, the extracted tea saponin has parameters being higher than those of the tea saponin extracted by using the traditional process, and the obtained product has good quality, no color, high purity and yield being over 90%.

Description

Technical field [0001] The present invention relates to a method for extracting tea saponin, more specifically, the present invention relates to a method for extracting tea saponin from tea seed cake. Background technique [0002] Tea saponin, also known as tea saponin, is a natural surfactant with good performance. It can be widely used in light industry, chemicals, pesticides, feed, aquaculture, textiles, oil extraction, mining, building materials and highway construction. Emulsifiers, detergents, pesticide auxiliaries, feed additives, protective agents for crab and shrimp breeding, textile auxiliaries, oilfield foaming agents, mining flotation agents, foam stabilizers for aerated concrete and concrete admixtures-antifreeze, etc. [0003] Tea saponin belongs to the triterpene saponins. It has a bitter and pungent taste, which stimulates the nasal mucosa to cause sneezing. The pure product is white fine columnar crystals, which is highly hygroscopic and acidic to methyl red. It is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J63/00C07H15/256C07H1/08
Inventor 曾科
Owner 曾科
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