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Aromatic sulfonic acid-selective ion exchange resin, and preparation method and application thereof

A technology of ion exchange resin and aromatic sulfonic acid, applied in organic anion exchangers, ion exchange water/sewage treatment, chemical instruments and methods, etc., can solve the problems of reducing resin adsorption capacity and dynamic performance, and achieve dynamic performance and selectivity, reduce adsorption, and ensure the effect of exchange capacity

Inactive Publication Date: 2018-04-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the practical application of the resin, it was found that the increase in the number of carbon chains in the grafted amination functional reagent or the introduction of cycloalkane can improve the adsorption selectivity of the resin, but at the same time it will also reduce the adsorption capacity and kinetic properties of the resin.

Method used

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  • Aromatic sulfonic acid-selective ion exchange resin, and preparation method and application thereof
  • Aromatic sulfonic acid-selective ion exchange resin, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take a 500ml three-neck flask, add 30g of resin chlorine balls with a crosslinking degree of 6% to it, and its chlorine content is 19wt%, and swell with 100ml of N,N-dimethylformamide solvent for 8h; take N-methyl Cyclohexylamine 120g (n(N) / n(Cl)=7:1), was added dropwise into a three-necked flask while stirring, and reacted at room temperature for 2h; slowly raised the temperature to 80°C, and continued to react for 12h; finally, drained and aminated The mother liquor is washed with water, dilute hydrochloric acid, water, dilute sodium hydroxide, and water in sequence to neutrality, and finally extracted with absolute ethanol and dried to obtain a weakly basic anion exchange resin modified by N-methylcyclohexylamine. The weak base exchange capacity of this resin is 2.74 mmol / g.

[0031] The aromatic sulfonic acid selective ion exchange resin is applied to the adsorption treatment of aromatic sulfonic acid wastewater. Taking p-toluenesulfonic acid wastewater as an examp...

Embodiment 2

[0033] Get the there-necked flask of 500ml, add 30g cross-linking degree wherein to be 12% resin chlorine ball, its chlorine content is 16wt%, with the dichloromethane solvent swelling 3h of 120ml; Get N-methylcyclohexylamine 30g ( n(N) / n(Cl)=2:1), add it dropwise into a three-necked flask while stirring, and react for 2 hours at room temperature; slowly raise the temperature to 60°C, and continue the reaction for 8 hours; finally, drain the amination mother liquor, and use water, Wash with dilute hydrochloric acid, water, dilute sodium hydroxide and water to neutrality, finally extract and dry with absolute ethanol to obtain a weakly basic anion exchange resin modified by N-methylcyclohexylamine, the weak base of the resin The exchange capacity is 2.05 mmol / g.

[0034] The aromatic sulfonic acid selective ion exchange resin is applied to the adsorption treatment of aromatic sulfonic acid wastewater. Taking p-toluenesulfonic acid wastewater as an example, when the concentrati...

Embodiment 3

[0036] Get the there-necked flask of 500ml, add 30g cross-linking degree wherein to it and be the resin chlorine ball of 6%, its chlorine content is 19wt%, swells 12h in the nitrobenzene solvent with 100ml; Get N-methylcyclohexylamine 80g ( (N) / n(Cl)=4:1), add it dropwise into a three-necked flask while stirring, and react at room temperature for 2 hours; slowly raise the temperature to 70°C, and continue the reaction for 12 hours; finally, drain the amination mother liquor, and dilute with water and Hydrochloric acid, water, dilute sodium hydroxide, water washing to neutrality, finally extracting with absolute ethanol, drying to obtain the product N-methylcyclohexylamine modified weakly basic anion exchange resin, the weak base exchange resin The capacity is 2.54 mmol / g.

[0037] The aromatic sulfonic acid selective ion exchange resin is applied to the adsorption treatment of aromatic sulfonic acid wastewater. Taking p-toluenesulfonic acid wastewater as an example, when the ...

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Abstract

The invention discloses an aromatic sulfonic acid-selective ion exchange resin, and a preparation method and an application thereof. The basic structure unit of the aromatic sulfonic acid-selective ion exchange resin is shown in the description, and n in the basic structure unit is a polymerization degree, is an integer and is not less than 1. The preparation method of the resin comprises the following steps: 1, immersing resin chloromethylated beads in an inert organic solvent to realize full swelling; 2, dropwise adding N-methylcyclohexylamine to the fully swelled resin chloromethylated beads, and carrying out stirring and full reacting; and 3, removing the obtained reaction solution after the full reaction, washing the obtained reaction product with water until the reaction product is neutral, and carrying out extraction and drying to obtain the aromatic sulfonic acid-selective ion exchange resin. The ion exchange resin has the advantages of easiness in synthesis, good dynamical performances and good selectivity, can be used in comprehensive treatment and recycling of high-salinity aromatic sulfonic acid wastewater, and has a wide application prospect.

Description

technical field [0001] The invention relates to an aromatic sulfonic acid selective ion exchange resin and a preparation method and application thereof, belonging to the field of ion exchange resins. Background technique [0002] Aromatic sulfonic acid compounds and their derivatives are an important class of fine chemicals, and are widely used as raw materials for synthetic catalysts, emulsifiers, preservatives, anti-attractants, lubricating oil additives, ion exchange resins and other special chemicals It is also an important intermediate for the preparation of acid compounds, dyes, medicines, leather preparations and pesticides. At present, the synthesis of aromatic sulfonic acid compounds mainly uses the sulfonation reaction of concentrated sulfuric acid and aromatic hydrocarbons, and the production process often includes neutralization processes, so aromatic sulfonic acid production wastewater generally contains a large amount of sulfate. Ion exchange resin has been su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/07C02F1/42C08F8/32C08F212/14C02F101/30
CPCB01J41/07C02F1/42C02F2101/40C08F8/32C08F212/14
Inventor 孙越闫宁宁江宇
Owner SOUTHEAST UNIV
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