Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for separating catechin, theaflavin, theanine and tea polysaccharide from instant tea

A technology for catechins and theaflavins, which is applied in the directions of organic chemistry methods, chemical instruments and methods, separation/purification of carboxylic acid amides, etc. problems such as low rate, to achieve the effect of high degree of automation, low production cost and good solubility

Active Publication Date: 2022-06-07
张守政
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, methods for extracting functional components such as catechins from tea leaves include resin adsorption method and chromatographic column separation method, but the functional components extracted by the existing extraction methods have low purity and yield, and high yield cannot be obtained. Purity catechin monomer
[0005] At present, there is no report on the method of separating and extracting catechins, theaflavins, theanine, and tea polysaccharides from instant tea with carbon dioxide supercritical fluid extraction technology at one time.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for separating catechin, theaflavin, theanine and tea polysaccharide from instant tea

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present invention separates catechin, theaflavin, theanine and tea polysaccharide from instant tea, such as figure 1 Described is a schematic diagram of the process flow, which comprises the following steps:

[0031] (1) Weigh 5,000 grams of green tea instant tea powder (containing 56.2% of tea polyphenols, 8.2% of caffeine, 12.6% of tea polysaccharides, 3.5% of theanine, and 5.3% of tea pigments), and suck it into a continuous dissolver with tangential rotation by jet vacuum. , use 4 times the weight ratio of deionized water to dissolve at a constant temperature of 50 ° C, the dissolution time is 20 minutes, add citric acid solution to adjust the pH value to 5.5, filter through a microfilter with a pore size of 1um, and obtain 24.5 liters of refined tea soup ;

[0032](2) described refined tea soup enters the first supercritical extraction kettle at a speed of 1.0 liters per minute continuously and quantitatively with a high-pressure syringe pump, at a constant te...

Embodiment 2

[0039] The present invention separates catechin, theaflavin, theanine and tea polysaccharide from instant tea, such as figure 1 Described is a schematic diagram of the process flow, which comprises the following steps:

[0040] (1) weigh 5000 grams of black tea instant tea powder (which contains 25.2% tea polyphenols, 7.4% caffeine, 22.2% tea polysaccharides, 4.8% theanine, and 26.5% tea pigments), and suck it into the continuous dissolver with tangential rotation by jet vacuum. , use 6 times the weight ratio of deionized water to dissolve in the range of constant temperature of 80 ℃, the dissolution time is 20 minutes, add citric acid solution to adjust the pH value to 6.8, filter through a microfilter with a pore size of 1um, and obtain 23.3 liters of refined tea soup ;

[0041] (2) described refined tea soup enters the first supercritical extraction kettle at a speed of 1.0 liters per minute continuously and quantitatively with a high-pressure syringe pump, at a constant t...

Embodiment 3

[0048] The present invention separates catechin, theaflavin, theanine and tea polysaccharide from instant tea, such as figure 1 Described is a schematic diagram of the process flow, which comprises the following steps:

[0049] (1) 5000 grams of oolong instant tea powder (which contains 38.6% tea polyphenols, 7.6% caffeine, 18.7% tea polysaccharides, 4.2% theanine, and 16.9% tea pigments), and a continuous dissolver with jet vacuum suction tangential rotation Inside, dissolve with deionized water with a weight ratio of 3 times in the range of constant temperature of 60 °C, the dissolution time is 15 minutes, add citric acid solution to adjust the pH value to 6.0, filter through a microfilter with a pore size of 1um, and obtain 21.8 liters of refined tea soup;

[0050] (2) the described refined tea soup enters the first supercritical extraction kettle at a speed of 1.0 liters per minute continuously and quantitatively with a high-pressure syringe pump, at a constant temperatur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
purityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for separating catechin, theaflavin, theanine and tea polysaccharide from instant tea. The instant tea is sucked into a dissolver, and the instant tea powder is dissolved to prepare tea soup, and petroleum ether is used as a carrier. Carbon dioxide supercritical fluid extraction and separation of caffeine in tea soup; carbon dioxide supercritical fluid extraction and separation of catechins in tea soup using ethyl acetate as a carrier; carbon dioxide supercritical fluid extraction and separation of theaflavins in tea soup using ethanol as a carrier agent; Theanine in tea soup was separated by supercritical fluid extraction of carbon dioxide with ammonium hydroxide as a carrier; the raffinate phase was subjected to alcohol analysis and then dried in vacuum at low temperature to obtain tea polysaccharides. The invention combines carbon dioxide supercritical fluid with various functional carriers, adjusts physical parameters such as pressure and temperature, and separates multiple active functional components from instant tea at one time; the separated catechins, theaflavins, and theanine 1. Tea polysaccharide has good color, good solubility and high active ingredients.

Description

technical field [0001] The invention belongs to the field of tea extraction technology, and relates to a method for separating and extracting functional components from tea leaves, in particular to a method for separating catechin, theaflavins, theanine and tea polysaccharides from instant tea. Background technique [0002] Tea contains catechin, theanine, tea polysaccharide, cholestenone, caffeine, inositol, folic acid, pantothenic acid and other ingredients, which can improve human health. Tea beverages are known as "one of the three major beverages in the world". [0003] Scientific research at home and abroad has proved that catechins in tea have the functions of scavenging free radicals and improving immunity, anti-oxidation, anti-aging, anti-radiation, anti-cancer and lowering blood lipids; theanine has functions such as lowering blood pressure and soothing the nerves and improving sleep. Tea polysaccharide has the functions of lowering blood sugar and enhancing immun...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/24C07D311/62C08B37/00C07C237/06C07B63/00
CPCC07D311/62C07C231/24C08B37/0003C07B63/00C07C237/06Y02P20/54
Inventor 张守政
Owner 张守政