Method for extracting theanine from tea leaves

A technology for theanine and tea, which is applied in pharmaceutical formulations, preparations for skin care, separation/purification of carboxylic acid amides, etc., can solve the problems of potential safety hazards in chemical synthesis methods, high cost of microbial fermentation methods, and weak practical applicability. , to achieve the effect of low production cost, speed up filtration and relieve pressure

Inactive Publication Date: 2017-08-11
唐雪平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used theanine preparation methods include chemical synthesis, microbial fermentation, and tea extraction. Among them, the chemical synthesis has potential safety hazards, and by-products will be produced during the synthesis process, causing envir

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1: A method for extracting theanine from tea, including the following steps:

[0023] (1) Extraction: pulverize the tea leaves, then place them in an extractor, add 45-60°C clear water to soak for 2 hours, pass through a 50-mesh sieve to obtain a preliminary filtrate; the volume ratio of tea leaves to clear water is 1:15 ;

[0024] (2) Cross-flow filtration: Inject the preliminary filtrate in step (1) into the cross-flow filtration system for cross-flow filtration, with a reflux ratio of 40%, to obtain a secondary filtrate;

[0025] (3) Microfiltration: Microfiltration of the secondary filtrate, with a pore size of 0.5um;

[0026] (4) Adsorption: The secondary filtrate is subjected to adsorption separation on a chromatography column, and the effluent is collected; the packing in the chromatography column is polyamide resin;

[0027] (5) Concentration: The effluent is concentrated for the first time with a reverse osmosis membrane with a molecular weight cut-off of 100, a...

Example Embodiment

[0029] Embodiment 2: A method for extracting theanine from tea, including the following steps:

[0030] (1) Extraction: Crush the tea leaves, then place them in an extractor, add 45-60°C clear water to soak for 6 hours, pass through a 50-mesh sieve, and obtain a preliminary filtrate; where the volume ratio of tea leaves to clear water is 1:8 ;

[0031] (2) Cross-flow filtration: Inject the preliminary filtrate in step (1) into the cross-flow filtration system for cross-flow filtration, with a reflux ratio of 80%, to obtain a secondary filtrate;

[0032] (3) Microfiltration: Microfiltration of the secondary filtrate, with a pore size of 0.2um;

[0033] (4) Adsorption: The secondary filtrate is subjected to adsorption separation on a chromatography column, and the effluent is collected; the packing in the chromatography column is a macroporous adsorption resin;

[0034] (5) Concentration: The effluent is concentrated for the first time with a reverse osmosis membrane with a molecular wei...

Example Embodiment

[0036] Embodiment 3: A method for extracting theanine from tea, including the following steps:

[0037] (1) Extraction: pulverize the tea leaves, then place them in an extractor, add 45-60℃ water to soak for 4 hours, pass through a 50-mesh sieve, and obtain a preliminary filtrate; where the volume ratio of tea leaves to water is 1:10 ;

[0038] (2) Cross-flow filtration: Inject the preliminary filtrate in step (1) into the cross-flow filtration system for cross-flow filtration, with a reflux ratio of 60%, to obtain a secondary filtrate;

[0039] (3) Microfiltration: Microfiltration of the secondary filtrate, with a pore size of 0.4um;

[0040] (4) Adsorption: The secondary filtrate is subjected to adsorption separation on a chromatography column, and the effluent is collected; wherein the filler in the chromatography column is a macroporous adsorption resin or polyamide resin;

[0041] (5) Concentration: The effluent is concentrated for the first time with a reverse osmosis membrane wi...

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PUM

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Abstract

The invention belongs to the technical field of theanine extraction and production, and specifically relates to a method for extracting theanine from tea leaves; including extraction, cross-flow filtration, microfiltration, adsorption, concentration, drying and other steps; the tea leaves provided by the invention The method for extracting theanine in the invention can shorten the process steps, reduce the extraction cost, and have high product yield.

Description

technical field [0001] The invention belongs to the technical field of theanine extraction and production, and in particular relates to a method for extracting theanine from tea leaves. Background technique [0002] Along with the continuous development of tealeaves, its health care function is more and more favored by people. Among them, theanine is a unique free acid in tea, which accounts for 1-2% in dry tea. It is the main component of tea that promotes body fluids and quenches thirst. products have broad application prospects. Currently commonly used theanine preparation methods include chemical synthesis, microbial fermentation, and tea extraction. Among them, the chemical synthesis has potential safety hazards, and by-products will be produced during the synthesis process, causing environmental pollution; the cost of microbial fermentation is relatively high. High, practical applicability is weak; and the tea extraction method that often adopts in the prior art has ...

Claims

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Application Information

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IPC IPC(8): C07C237/06C07C231/24A61K8/44A61Q19/10A61Q5/02
CPCC07C231/24A61K8/44A61Q5/02A61Q19/10C07C237/06
Inventor 苗欣雨
Owner 唐雪平
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