High mechanical strength anion exchange resin with phenolic-polyacrylic interpenetrating structure and preparation method thereof

A technology of polyacrylic acid and resin exchange, applied in the field of resin materials, can solve the problems of inorganic magnetic particles falling off, poor mechanical strength of resin, loss of resin, etc., achieve the effect of less broken, improved mechanical strength of resin, and reduced cost

Active Publication Date: 2019-06-25
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, whether it is magnetic or non-magnetic polyacrylic resin, the synthesis of this type of resin needs to use acrylate or glycidyl acrylate as a monomer, resulting in poor mechanical strength of the synthesized resin, making it in contact with each other in water treatment. During the friction process, 5-10 µm resin suspended particles are produced, resulting in resin loss and secondary pollution of water
At present, in order to improve the mechanical strength of polyacrylic acid resin, some researchers adopt different synthesis methods and processes, such as adjusting the type and content of crosslinking agent, optimizing the ratio of monomers and changing experimental conditions, etc., but the mechanical strength of polyacrylic acid resin The improvement is not obvious
Although some researchers introduce inorganic nanoparticles into polyacrylic resin particles to change their mechanical strength, as disclosed in patent CN107754867A, the in-situ method is used to introduce magnetic particles into polyacrylic resin, and then use silane coupling agent to wrap magnetic polyacrylic resin, A magnetic polyacrylic resin with high mechanical strength has been obtained, but the resin synthesized by this method will also have a certain degree of shedding of inorganic magnetic particles during the water treatment process, thereby affecting the water quality after treatment.
In addition, patent CN1470541A and patent CN1050882A disclose the method of using cation exchange resin as a catalyst to prepare phenolic resin, but it is different from the high mechanical strength anion exchange resin and preparation method of a phenolic polyacrylic acid interpenetrating structure disclosed in this patent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix 20.0mL phenol and 36.5mL formaldehyde solution, add 10.0g anion exchange resin D213 (polyacrylic acid series anion exchange resin D213 produced in China, Jiangsu Jinkai Resin Chemical Co., Ltd.) to it, stir evenly at room temperature for 1.0h, and put After the resin was taken out and drained, the resin was transferred to a flask containing 50 mL of liquid paraffin, and 0.010 g of sodium oleate and 5.0 mL of hydrochloric acid with a mass fraction of 37.0% were added to the flask, and the reaction temperature was adjusted to 80 ° C. The reaction time is 1.0h. After the reaction, separate the resin from the mixed solution, wash the resin to neutrality with methanol and water, then transfer the resin to a new 50mL liquid paraffin, add 5mL ammonia solution with a mass fraction of 37.5% to it, and adjust the reaction temperature To 80°C, the reaction time is 1.0h. After the reaction was complete, the resin was washed to neutrality with methanol and water. Passing the n...

Embodiment 2

[0037]Mix 20.0mL phenol and 49.5mL paraformaldehyde solution, add 15.0g anion exchange resin D213 (polyacrylic acid anion exchange resin D213 produced in China, Jiangsu Jinkai Resin Chemical Co., Ltd.) to it, stir evenly at room temperature for 1.0h, and mix After the resin in the solution was pulled out and drained, the resin was transferred to a flask equipped with 50 mL diethyl phthalate, and 0.015 g sodium dodecylbenzenesulfonate and 7.5 mL mass fraction were added to the flask. 35.0% sulfuric acid, adjust the reaction temperature to 105°C, and the reaction time to 0.5h. After the reaction, the resin was separated from the mixed solution, and the resin was washed to neutrality with ethanol and water, then the resin was transferred to a new 50mL diethyl phthalate, and 4.0mL of 40.0% diethyl phthalate was added to it. Sodium hydroxide solution, adjust the reaction temperature to 85°C, and the reaction time is 1.0h. After the reaction was complete, the resin was washed to ne...

Embodiment 3

[0039] Mix 20.0mL phenol and 55.5mL acetaldehyde solution, add 8.0g anion exchange resin D213 (polyacrylic acid anion exchange resin D213 produced in China, Jiangsu Jinkai Resin Chemical Co., Ltd.) After the resin was removed and drained, the resin was transferred to a flask containing 50 mL of vegetable oil, 0.001 g of secondary alkyl sodium sulfate and 3.5 mL of nitric acid with a mass fraction of 25.0% were added to the flask, and the reaction temperature was adjusted to 90 °C, the reaction time is 5.0h. After the reaction, separate the resin from the mixed solution, wash the resin to neutrality with ethanol and water, then transfer the resin to new 50mL vegetable oil, add 2.5mL of potassium hydroxide solution with a mass fraction of 10.0% to it, adjust The reaction temperature was 90°C, and the reaction time was 10.5h. After the reaction was complete, the resin was washed to neutrality with ethanol and water. Passing the national test standard for the sphericity after re...

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Abstract

Belonging to the field of resin materials, the invention in particular relates to a high mechanical strength anion exchange resin with a phenolic-polyacrylic interpenetrating structure and a preparation method thereof. Specifically, the preparation method comprises the steps of: (1) mixing a phenolic compound, an aldehyde compound and polyacrylic anion exchange resins evenly; (2) separating resinout of the mixed solution obtained in step (1), mixing the resin with a disperse phase, adding a surfactant and an acidic or alkaline catalyst, and carrying out reaction at 35-105DEG C; and (3) cleaning the resin obtained in step (2) to neutral, then performing mixing with a disperse phase, adding an alkaline catalyst, carrying out reaction at 35-105DEG C, separating out resin at the end of the reaction, and performing cleaning to neutral. The resin prepared by the method provided by the invention has significantly improved mechanical strength, and the post-grinding ball rate can reach 99.9%,also the resin has large strong basic anion exchange capacity, and can be used for removal of anion pollutants in actual wastewater.

Description

technical field [0001] The invention belongs to the field of resin materials, in particular to a high mechanical strength anion exchange resin with a phenolic-polyacrylic acid interpenetrating structure and a preparation method thereof. Background technique [0002] Resin materials are widely used in water treatment due to their advantages such as adjustable structure, high adsorption capacity, strong selectivity and easy desorption and regeneration. Polyacrylic resin and polystyrene resin are the two most widely used resins at present, but for organic pollutants with strong hydrophilicity, polyacrylic resin is superior to polystyrene resin in terms of adsorption and regeneration performance. The further development of magnetic polyacrylic resin, such as the magnetic acrylic strong base anion exchange microsphere resin disclosed in patent CN101781437A, the polyacrylic resin is easier to be separated in the actual water treatment due to its magnetic properties, so that it can...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08L61/06C08L61/12C08L33/00C08L91/06C08K5/098C08G8/06C08G8/04C08G8/10C08G8/22C08G8/12C08G8/08
Inventor双陈冬张光杨旭东张婧玥李爱民
OwnerNANJING UNIV