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Modification method of polystyrene resin for adsorbing flavones

A polystyrene and flavonoid technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem of poor selection of adsorbents, and achieve better adsorption effect, strong practicability, and mild reaction conditions. Effect

Inactive Publication Date: 2015-05-13
BEIHAI HESI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common situation in various studies is: a macroporous adsorption resin can only adsorb one or several flavonoids, and there is little reference for the selection of other flavonoid adsorbents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The resin first undergoes chloromethylation reaction, and the chloromethylated resin is easy to undergo amination reaction.

[0023] Step 1: The resin is swelled in ethanol for 72 hours, and the fully swollen resin is washed with deionized water.

[0024] Step 2: Add 20 g of macroporous adsorption resin and 160 g of chloromethyl ether into a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, slowly add 14 g of zinc chloride powder after stirring, and heat up to 45 ℃ after mixing evenly. ℃, constant temperature reaction for 12 hours, after the reaction was completed, the mixed solution was cooled, and the chloromethylated resin was filtered out under reduced pressure.

[0025] Step 3: Rinse the resin with ethanol, then rinse the ethanol with deionized water.

Embodiment 2

[0027] The resin chloromethylation reaction process is detailed in Example 1, and the amination reaction is carried out on the basis of the chloromethylated resin.

[0028] Step 1: Soak the macroporous adsorption resin in ethanol for 12 hours, then rinse the fully swollen resin with ionized water until the ethanol in the resin is washed away.

[0029] Step 2: Add 20 g of chloromethylated resin and 80 g of methylamine into a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, heat it in a water bath to 45° C., and finish the experiment after 12 hours of reaction. After the reaction mixture is cooled Suction filtration under reduced pressure was performed to obtain aminated resin particles.

[0030] Step 3: Rinse the resin with dimethylformamide, then wash off the dimethylformamide with deionized water.

[0031] Step 4: Soak the resin in 1.5% hydrochloric acid for 2H, wash with deionized water until the pH of the solution is neutral; then soak in 1...

Embodiment 3

[0034] The resin chloromethylation reaction process is detailed in Example 1, and the amination reaction is carried out on the chloromethylated resin.

[0035] Step 1: Soak the macroporous adsorption resin in ethanol for 12 hours, then rinse the fully swollen resin with ionized water until the ethanol in the resin is washed away.

[0036] Step 2: Add 20 g of chloromethylated resin and 100 g of methylamine to a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, heat up to 45° C. in a water bath, and finish the experiment after 12 hours of reaction. After the reaction mixture is cooled Suction filtration under reduced pressure was performed to obtain aminated resin particles.

[0037] Step 3: Rinse the resin with dimethylformamide, then wash off the dimethylformamide with deionized water.

[0038] Step 4: Soak the resin in 1.5% hydrochloric acid for 2H, wash with deionized water until the pH of the solution is neutral; then soak in 1.5% NaOH for 2...

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Abstract

The invention discloses a modification method of a polystyrene resin for adsorbing flavones, which comprises the following steps: adding the polystyrene resin and chloromethyl ether into a three-neck flask which is provided with a stirrer, a thermometer and a reflux condenser, carrying out chloromethylation reaction under the action of a catalyst zinc chloride, carrying out vacuum filtration on the chloromethylation resin obtained by reaction, separating from the reaction solution, cleaning with ethanol, and swelling; and adding a chloromethylated resin and an amino reagent methylamine into the three-neck flask which is provided with the stirrer, thermometer and reflux condenser, and heating in a water bath to 45 DEG C to react for 12 hours, thereby obtaining the amino modified resin. When the modified resin is used for extracting total flavones in the ethanol extract, the adsorption capacity of every gram of modified resin reaches 58.776mg. The modification method has the advantages of mild reaction conditions, high practicality and the like, and is widely applicable to the polystyrene resin.

Description

technical field [0001] The invention relates to the field of preparation of macroporous adsorption resins, in particular to a method for preparing macroporous adsorption resins for adsorbing polar flavonoids. Background technique: [0002] Flavonoids are widely distributed in nature, and mostly exist in leaves and fruits of plants. Flavonoids have strong biological activity, so they are widely used in medicine, such as dilating blood vessels, antibacterial and anti-inflammatory, inhibiting tumor cell growth, protecting liver and anti-aging. Oxidation and other effects. Due to the changes in the family and ring system of flavonoids, they can be classified into flavonoids and flavonols. Chalcones, orange ketones, anthocyanins, and the dihydro derivatives of the above-mentioned types, the structural diversity of flavonoids leads to differences in physical and chemical properties. [0003] In recent years, there have been more and more studies on the purification process of fl...

Claims

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Application Information

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IPC IPC(8): C08F8/32C08F8/24B01J20/26B01J20/30
Inventor 陈平
Owner BEIHAI HESI TECH
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