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Method for preparing tea polysaccharide iron

A technology of tea polysaccharide and solution is applied in the field of preparation of tea polysaccharide iron, which can solve the problems of unattended old tea, waste of natural resources and the like, and achieve the effect of simple method and good water solubility.

Inactive Publication Date: 2019-03-15
常馨尹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country is very rich in tea resources. The thicker and older the tea, the higher the tea polysaccharides contained in it. However, with the improvement of people's living standards, the thicker and older tea is becoming less and less popular, resulting in a great waste of natural resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of tea polysaccharide iron comprises the following steps:

[0020] (1) According to the mass ratio of tea polysaccharide, trisodium citrate, and water as 5:2:200, take tea polysaccharide and trisodium citrate, add them to water, then heat and stir at 80°C for 30min, and then control the temperature at 60°C ℃, while adding NaOH solution with a mass concentration of 30% and FeCl with a concentration of 0.5mol / L 3 Solution, control the pH of the system between 8-8.5, when the system produces reddish-brown insoluble precipitate, stop adding NaOH solution and FeCl 3 Solution, stirred and reacted for 90min at a rotating speed of 500rpm;

[0021] (2) The product of step (1) was sonicated for 15 minutes under the conditions of ultrasonic power 400W and ultrasonic frequency 45KHz, heated at 70°C for 30 minutes, cooled at room temperature, centrifuged at 3000rpm for 30 minutes, and added to the supernatant 3 times the volume of ethanol solution with a mas...

Embodiment 2

[0024] The preparation method of tea polysaccharide iron comprises the following steps:

[0025] (1) According to the mass ratio of tea polysaccharide, trisodium citrate, and water as 10:8:200, take tea polysaccharide and trisodium citrate, add them to water, then heat and stir at 90°C for 20min, and then control the temperature at 70°C ℃, while adding NaOH solution with a mass concentration of 40% and FeCl with a concentration of 1.5mol / L 3 Solution, control the pH of the system between 8-8.5, when the system produces reddish-brown insoluble precipitate, stop adding NaOH solution and FeCl 3 Solution, stirred and reacted for 90-120min at a rotating speed of 500rpm;

[0026] (2) Ultrasonicate the product of step (1) for 15 minutes under the conditions of ultrasonic power 500W and ultrasonic frequency 45KHz, heat at 80°C for 20 minutes, cool at room temperature, centrifuge at 3000rpm for 40 minutes, and add 3 times the volume of ethanol solution with a mass concentration of 95...

Embodiment 3

[0029] The preparation method of tea polysaccharide iron comprises the following steps:

[0030] (1) According to the mass ratio of tea polysaccharide, trisodium citrate, and water as 8:5:200, take tea polysaccharide and trisodium citrate, add them to water, then heat and stir at 85°C for 25min, and then control the temperature at 65°C ℃, while adding NaOH solution with a mass concentration of 35% and FeCl with a concentration of 1mol / L 3 Solution, control the pH of the system between 8-8.5, when the system produces reddish-brown insoluble precipitate, stop adding NaOH solution and FeCl 3 Solution, stirred and reacted for 100min at a rotating speed of 500rpm;

[0031] (2) Ultrasonicate the product of step (1) for 12min under the conditions of ultrasonic power 450W and ultrasonic frequency 45KHz, heat at 75°C for 25min, cool at room temperature, centrifuge at 3000rpm for 35min, and add 3 times the volume of ethanol solution with a mass concentration of 95%, after stirring, le...

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Abstract

The invention discloses a method for preparing tea polysaccharide iron. The method comprises the following steps: step (1) taking and adding tea polysaccharide and trisodium citrate into water, heating and stirring, then controlling the temperature at 60-70 DEG C, dropwise adding an NaOH solution and an FeCl3 solution at the same time, controlling a pH of the system in 8-8.5, stopping adding the NaOH solution and the FeCl3 solution when reddish brown insoluble precipitates are generated in the system, and stirring for reaction; step (2) performing ultrasonic treatment, heating, cooling at roomtemperature, then centrifuging, adding an ethanol solution into a supernatant, standing after stirring, and collecting precipitates; and step (3) washing the precipitates of the step (2) three timeswith absolute ethanol, and then drying in vacuum. The method provided by the invention is simple; and the prepared tea polysaccharide iron is used as an anti-caking agent for salt, has good water solubility, green and nontoxicity and biological activity, is a component beneficial to the body, and can be absorbed and utilized.

Description

technical field [0001] The invention belongs to the technical field of food additives, and in particular relates to a preparation method of tea polysaccharide iron. Background technique [0002] Salt is an irreplaceable necessity in people's life, and plays an important role in adjusting human body functions and maintaining human health. Salt is deliquescent and easy to solidify, which seriously affects the storage, transportation and use of salt. Avoiding salt agglomeration is a subject that has been studied by the salt industry. The most effective and economical way to prevent salt agglomeration is to add anti-caking agents. The anti-caking agents commonly used in the market at present, such as potassium ferrocyanide and meso-tartrate, are all products developed by Akzo Nobel in the Netherlands in recent decades. There is still no self-developed product in this field. Therefore, there is an urgent need to develop a green and safe new anti-caking agent for salt in China. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00A23L29/30A23L27/40
CPCC08B37/00A23L27/40A23L29/30
Inventor 常馨尹
Owner 常馨尹
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