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Dicyclohexylamine modified ion exchange resin, and preparation method and application of ion exchange resin

A technology of ion exchange resin and dicyclohexylamine, which is applied in chemical instruments and methods, water/sludge/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of decreased adsorption performance and application limitations of aromatic sulfonic acid, Achieve the effect of low cost, simple preparation and stable performance

Inactive Publication Date: 2015-09-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the actual wastewater often contains high concentrations of sulfate, the competition of sulfate ions leads to a sharp decline in the adsorption performance of the existing ion exchange resins for aromatic sulfonic acids, resulting in the application of ion exchange resins to treat aromatic sulfonic acid wastewater. limit

Method used

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  • Dicyclohexylamine modified ion exchange resin, and preparation method and application of ion exchange resin
  • Dicyclohexylamine modified ion exchange resin, and preparation method and application of ion exchange resin
  • Dicyclohexylamine modified ion exchange resin, and preparation method and application of ion exchange resin

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preparation example Construction

[0022] A preparation method of a dicyclohexylamine-modified ion-exchange resin. Firstly, a suspension polymerization method is used to prepare a macroporous styrene-divinylbenzene copolymer with a crosslinking degree of 4 to 12%, that is, a resin white ball, and then undergo chloromethylation. React to obtain resin chlorine balls, swell the resin chlorine balls in N,N-dimethylformamide, add dicyclohexylamine dropwise at room temperature, raise the temperature to 50-80°C, stir and react to obtain dicyclohexylamine Modified ion exchange resins. The amount of dicyclohexylamine reagent added is 2 to 8 times the mass of resin chlorine balls, and the reaction time is 4 to 12 hours. By controlling the chlorine content of resin chlorine balls, the amount of dicyclohexylamine reagent and the reaction time, a series of dicyclohexylamine reagents can be prepared. Hexylamine modified ion exchange resin.

[0023] Determine other conditions, use the resin chlorine balls of different chlori...

Embodiment 1

[0026] (a) Preparation of macroporous styrene-divinylbenzene resin white balls.

[0027] In a 250mL beaker, add 88g of styrene, 12g of divinylbenzene, and 100g of liquid paraffin, stir well and set aside. In a 1000mL three-necked flask, add 450g of distilled water and 3.75g of gelatin, raise the temperature to 40°C, add the above-mentioned mixture of styrene, divinylbenzene and liquid paraffin under stirring, add 1g of benzoyl peroxide, and add 1g of benzoyl peroxide at a rate of 0.5°C / min Raise the temperature to 75°C at a high speed, keep it warm for 5 hours, slowly raise the temperature to 85°C, keep it warm for 4 hours, after the reaction is over, filter out the resin sphere, wash it with hot water, drain it, put it into a Soxhlet extractor, use ethanol as the solvent to extract it, and then Dry with hot air to obtain macroporous styrene-divinyl styrene resin white balls.

[0028] (b) Chloromethylation reaction

[0029] In a 500mL three-neck flask, add 50g of macroporous...

Embodiment 2

[0033] The synthetic steps of another embodiment of the present invention are as follows:

[0034] (a) In a 250mL beaker, add 96g of styrene, 4g of divinylbenzene, and 50g of liquid paraffin, stir well and set aside. In a 1000mL three-necked flask, add 450g of distilled water and 3.75g of gelatin, raise the temperature to 45°C, add the above-mentioned mixture of styrene, divinylbenzene and liquid paraffin under stirring, add 1g of benzoyl peroxide, and add 1g of benzoyl peroxide at a rate of 0.5°C / min The temperature was raised to 78°C at a high speed, kept for 5 hours, slowly raised to 85°C, kept for 4 hours, the reaction was completed, the resin spheres were filtered out, washed with hot water, drained, put into a Soxhlet extractor, and extracted with acetone as a solvent, and then Dry with hot air to obtain macroporous styrene-divinyl styrene resin white balls.

[0035] (b) In a 500mL three-necked flask, add 30g of macroporous styrene-divinylbenzene resin white balls, 240g...

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Abstract

The invention discloses dicyclohexylamine modified ion exchange resin, and a preparation method and an application of the ion exchange resin, and belongs to the field of ion exchange resin. The preparation method of the dicyclohexylamine modified ion exchange resin comprises the steps that a macroporous styrene-divinylbenzene copolymer with crosslinking degree of 4-12% is prepared by a suspension polymerization method; chloromethyl polystyrene resin is obtained via a chloromethylation reaction; the chloromethyl polystyrene resin sufficiently swells by utilizing an inert organic solvent; a dicyclohexylamine group is grafted on the chloromethyl polystyrene resin; and the dicyclohexylamine modified ion exchange resin is obtained. The weak base exchange capacity of the resin is 1.29-2.94mmol / g. The resin is simple to synthesize and stable in performance, can be used for treatment and recycling of arenesulfonate wastewater, and has a wide application prospect.

Description

technical field [0001] The invention relates to an ion exchange resin and a preparation method thereof, in particular to a dicyclohexylamine-modified ion exchange resin, a preparation method and application thereof. Background technique [0002] Aromatic sulfonic acid compounds are important intermediates in industrial production such as pharmaceuticals, dyes and leather. Since its production process generally adopts sulfonation process, its production wastewater is often acidic and contains high concentrations of sulfates. At present, the methods for treating this kind of wastewater mainly include biological method, advanced oxidation method, extraction method, adsorption method, etc. Since aromatic sulfonic acid compounds are a class of compounds with poor biodegradability, the use of biological methods generally requires the cultivation of special special-purpose Bacteria, and the effect is not good; while the advanced oxidation method strengthens the treatment effect of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F8/24C08F8/32C02F1/28C02F1/58
Inventor 孙越左鹏罗军芬尹德强罗加腾
Owner SOUTHEAST UNIV
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