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Preparation method of magnetic porous wool adsorbent for separation and purification of catechin

A technology of adsorbent and catechin, applied in chemical instruments and methods, organic chemistry, other chemical processes, etc., can solve the problem of increasing the prevalence of rheumatoid arthritis, the environment is easily affected, and the safety requirements are high. problems, to achieve the effect of easy industrial production, good adsorption selection, and good desorption performance

Inactive Publication Date: 2019-07-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dried tea leaves contain about 20% catechins, about 3% caffeine and other substances. During the extraction process of catechins, caffeine is also extracted at the same time. Caffeine can stimulate the central nervous system, increase blood pressure, improve The prevalence of rheumatoid arthritis, etc. Therefore,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of magnetic porous wool microspheres: In the reactor, add thioglycolic acid: 30g, degreased wool: 10g, raise the temperature to 110±2℃, react for 6 hours, cool to room temperature, deionized water: 46 mL, Sodium bisulfite: 7g, Sodium dodecylsulfonate: 1.5g, keep the temperature up to 90±2°C, stir, react for 4h, cool to room temperature, add the mixture of nano ferric oxide and xanthan gum : 5g, ultrasonic dispersion 30min, the obtained viscous liquid is sprayed in the magnesium chloride solution that mass percent concentration is 5%, the particle diameter of composite microsphere is controlled by the diameter of nozzle, cleaning, solid-liquid separation, freeze-drying, obtains Magnetic porous wool microspheres;

[0025] (2) Aminated magnetic porous composite microspheres: In the reactor, add deionized water: 72 mL, dicyandiamide: 12 g, ammonium acetate: 5 g, heat and stir to dissolve, magnetic porous wool microspheres: 11 g, Constant temperature, stirri...

Embodiment 2

[0028] (1) Preparation of magnetic porous wool microspheres: In the reactor, add thioglycolic acid: 140g, degreased wool: 60g, raise the temperature to 110±2℃, react for 6 hours, cool to room temperature, deionized water: 240 mL, sodium bisulfite: 40g, sodium dodecylsulfonate: 2.5g, temperature rises to 90±2°C, stirs, reacts for 4 hours, cools to room temperature, adds nano-ferric oxide and xanthan gum mixture : 20g, ultrasonic dispersion 30min, the obtained viscous liquid is sprayed in the magnesium chloride solution that mass percent concentration is 5%, the particle diameter of composite microsphere is controlled by the diameter of nozzle, cleaning, solid-liquid separation, freeze-drying, obtains Magnetic porous wool microspheres;

[0029](2) Aminated magnetic porous composite microspheres: In the reactor, add deionized water: 350mL, dicyandiamide: 70g, ammonium acetate: 20g, heat and stir to dissolve, magnetic porous wool microspheres: 60g, in Constant temperature at 70±2...

Embodiment 3

[0032] (1) Preparation of magnetic porous wool microspheres: In the reactor, add thioglycolic acid: 32g, degreased wool: 8g, raise the temperature to 110±2℃, react for 6 hours, cool to room temperature, deionized water: 50 mL, Sodium bisulfite: 6g, Sodium dodecylsulfonate: 1g, keep the temperature up to 90±2°C, stir, react for 4h, cool to room temperature, add the mixture of nano ferric oxide and xanthan gum: 4g, ultrasonically disperse for 30 minutes, spray the obtained viscous liquid in a magnesium chloride solution with a mass percentage concentration of 5%, control the particle size of the composite microspheres through the diameter of the nozzle, wash, separate solid and liquid, and freeze-dry to obtain magnetic Porous wool microspheres;

[0033] (2) Aminated magnetic porous composite microspheres: In the reactor, add deionized water: 74 mL, dicyandiamide: 10 g, ammonium acetate: 6 g, heat and stir to dissolve, magnetic porous wool microspheres: 10 g, Constant temperatur...

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Abstract

The invention discloses a preparation method of a magnetic porous wool adsorbent for separation and purification of catechin. The preparation method is characterized in that degreased wool is dissolved by mercaptoacetic acid and sodium hydrogen sulfite, a nano ferroferric oxide and xanthan gum mixture is added, and magnetic porous wool microspheres are obtained; the magnetic porous wool microspheres are aminated by dicyanodiamine and ammonium acetate, and aminated magnetic porous wool microspheres are prepared; components including, in percentage by mass, 68%-72% of deionized water, 8%-12% offormic acid and 4%-6% of cucurbit[6]uril are added to a reactor, stirred and dissolved, and 12%-16% of the aminated magnetic porous wool microspheres are added, the mixture is subjected to a constant-temperature reaction at the temperature of 50 DEG C plus or minus 2 DEG C for 5 h, solid-liquid separation and drying are performed, and the magnetic porous wool adsorbent for separation and purification of catechin is obtained. The adsorbent has high adsorption capacity for the catechin, has specificity, is low in cost, high in mechanical strength and easy to separate and can be repeatedly used for 10 times or more.

Description

technical field [0001] The present invention relates to a preparation method of a modified magnetic biosorbent, in particular to a preparation method of a magnetic porous wool adsorbent for separation and purification of catechin and its application to adsorption, separation and purification of catechin, which belongs to separation and purification technology field. Background technique [0002] Catechin is a class of phenolic active substances extracted from natural plants such as tea. It has various pharmacological effects such as anti-tumor, anti-oxidation, anti-bacteria, scavenging free radicals, delaying aging, changing the distribution of intestinal microorganisms, and protecting heart and brain organs. These pharmacological activities are mainly determined by its polyhydroxy structure. Dried tea leaves contain about 20% catechins, about 3% caffeine and other substances. During the extraction process of catechins, caffeine is also extracted at the same time. Caffeine ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C07D311/62
CPCB01J20/22B01J20/24C07D311/62
Inventor 李慧芝赵可贤张卫民
Owner UNIV OF JINAN