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Chelate resin as well as preparation method and application thereof

A technology of chelating resins and resins, which is applied in the field of chelating resins and its preparation, can solve the problems of slow adsorption speed, poor hydrophilicity, and small adsorption capacity, and achieve good product quality, high elution rate, and high selectivity Effect

Active Publication Date: 2022-02-15
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on chelating adsorbents in the field of metal separation and recovery is quite active, but the chelating adsorbents prepared by introducing a small amount of functional groups on polymers have poor hydrophilicity, small adsorption capacity, and slow adsorption speed.

Method used

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  • Chelate resin as well as preparation method and application thereof
  • Chelate resin as well as preparation method and application thereof
  • Chelate resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] A kind of preparation method (R group is methyl) of 2-hydroxy-6-methylbenzoic acid chelate resin, comprises the following steps:

[0100] (1) Pretreatment: In a 250mL beaker, add 30g of chlorine balls (4% cross-linking degree), 100mL of deionized water, stir at room temperature, repeat the above washing 3 times, then suction filter, then add 100mL of absolute ethanol , stirred, and repeated washing 3 times. Suction filtration to obtain clean chlorine balls for later use. (2) Esterification reaction: In a 200 mL three-necked flask, 12.00 g of 2,4-dihydroxy-6-methylbenzoic acid, 60 mL of methanol, and 5 mL of sulfuric acid were added, and the mixture was refluxed for 20 h. After the reaction was completed, it was cooled to room temperature, methanol was removed under reduced pressure, and the residue was poured into 200 mL of ice water. The precipitate was collected and washed with water. The solid was recrystallized (methanol / hexanes) to give the product methyl 2,4-di...

Embodiment 2

[0102] A kind of preparation method of 2-hydroxymethylbenzoic acid chelating resin (R 1 base is CH 2 OH), including the following steps:

[0103](1) Pretreatment: In a 250mL beaker, add 30g of chlorine balls (4% cross-linking degree), 100mL of deionized water, stir at room temperature, repeat the above washing 3 times, then suction filter, then add 100mL of absolute ethanol , stirred, and repeated washing 3 times. Suction filtration to obtain clean chlorine balls for later use. (2) Esterification reaction: In a 200 mL three-necked flask, 12.00 g of 2-hydroxymethyl-4-hydroxybenzoic acid, 60 mL of methanol, and 5 mL of sulfuric acid were added, and the mixture was refluxed for 20 h. After the reaction, it was cooled to room temperature, methanol was removed under reduced pressure, and the residue was poured into 200 mL of ice water. The precipitate was collected and washed with water. The solid was recrystallized (methanol / hexanes) to give the product methyl 2-hydroxymethyl...

Embodiment 3

[0105] A kind of preparation method of o-hydroxyphenylacetic acid chelating resin (R 2 base is CH 2 COOH), including the following steps:

[0106] (1) Pretreatment: In a 250mL beaker, add 30g of chlorine balls (4% cross-linking degree), 100mL of deionized water, stir at room temperature, repeat the above washing 3 times, then suction filter, then add 100mL of absolute ethanol , stirred, and repeated washing 3 times. Suction filtration to obtain clean chlorine balls for later use. (2) Esterification reaction: In a 200 mL three-necked flask, 12.00 g of 2,4-dihydroxyphenylacetic acid, 60 mL of methanol, and 5 mL of sulfuric acid were added, and the mixture was refluxed for 20 h. After the reaction, cooled to room temperature, methanol was removed under reduced pressure, and the residue was poured into 200 mL of ice water. The precipitate was collected and washed with water. The solid was recrystallized (methanol / hexanes) to give the product methyl 2,4-dihydroxyacetate as a w...

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Abstract

The invention relates to a chelate resin and a preparation method and application thereof, wherein the chelate resin has the following structure: in the formula, R is selected from any one or more of H, alkyl or alkoxy containing C1-C10 straight chains or branched chains, chlorine and bromine, R1 is selected from (CH2) nOH, R2 is selected from (CH2) nCOOH, and n is 0-3 and represents a chloro-sphere; Compared with the prior art, the synthesized novel chelate resin product can effectively remove metal impurities such as nickel, cobalt, manganese, calcium, magnesium, iron, zinc and copper in metal wastewater under different acidity, the removal rate reaches up to 99%, and the chelate resin can be used for purifying water or treating wastewater containing metal ions.

Description

technical field [0001] The invention relates to the technical field of resin preparation, in particular to a chelating resin and its preparation method and application. Background technique [0002] Electroplating wastewater, electronics industry wastewater, and non-ferrous metal mining and smelting wastewater contain a large amount of metals. These metal-containing wastewaters have caused great harm to the human living environment. Reducing the metal content in wastewater and reducing the pollution of metals to the environment have important environmental and economic benefits. [0003] Traditional methods for treating metal-containing wastewater include chemical precipitation, ion exchange, adsorption, electrochemical, redox, and membrane separation techniques. Among them, the ion exchange and adsorption methods mainly use synthetic ion exchange resins. Because the crosslinked polymer skeleton of the resin is insoluble in acids, alkalis, water and other organic solvents, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F8/12C08F8/00B01J20/26C02F1/28B01J20/30
CPCC08F8/12B01J20/265C02F1/285C08F8/00C08F212/08
Inventor 刘超朱光辉马晓玉胡晓钧庞婉吴晶晶
Owner SHANGHAI INST OF TECH
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