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Novel strongly and weakly alkaline anion exchange resin and preparation method thereof

A technology of exchange resin and anion, which is applied in the field of ion exchange resin preparation technology, can solve the problems of strong and weak base resin synthesis and less application, and achieve the effect of large exchange capacity

Active Publication Date: 2011-09-21
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports about the synthesis and application of strong and weak base resins.

Method used

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  • Novel strongly and weakly alkaline anion exchange resin and preparation method thereof
  • Novel strongly and weakly alkaline anion exchange resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 15g of macroporous chloromethylated polystyrene resin to a 250mL four-necked flask equipped with a stirrer, a spherical condenser, and a thermometer, swell with 100mL of absolute ethanol for 8 hours, and then add 3 times the amount (molar ratio) of diethanolamine 25mL, heated up to 50°C, and reacted for 18h. Pour out liquids such as ethanol, add 100mL of 1mol / L sodium hydroxide solution, stir at room temperature for 2h, pour out the liquid, wash with water until neutral, and reflux extract with absolute ethanol for 24h. Vacuum dry. Resin I was obtained with the following structural formula. Its infrared spectrum is as figure 1 .

[0025] .

[0026] Add 5.0g of resin Ⅰ to a 100mL four-necked flask equipped with a stirrer, spherical condenser and thermometer, add 30mL of benzene dried over magnesium sulfate for 48 hours, and 5mL of pyridine dried over anhydrous potassium carbonate, and swell for 6 hours under ice-water bath conditions. 25mL of thionyl chloride ...

Embodiment 2

[0029] The steps for preparing resin II are the same as in Example 1.

[0030] Add 1g of resin II, 50mL of DMF to a 100mL four-necked flask equipped with an electric stirrer, a spherical condenser, and a thermometer, and swell for 12h. Add 4mL of triethylamine, start stirring, heat, and raise the temperature to 80°C for 24h. After the reaction, the resin is placed in a glass ion exchange column, rinsed with ethanol until no oil flows out, and rinsed with a large amount of deionized water to obtain a chlorine-type strong and weak base anion exchange resin. The exchange amount of strong base and weak base is shown in Table 1, and the structural formula is as follows:

Embodiment 3

[0032] Add 15g of macroporous chloromethylated polystyrene resin to a 250mL four-necked flask equipped with a stirrer, a spherical condenser, and a thermometer, swell with 100mL of absolute ethanol for 8 hours, and then add 20mL of 4 times the amount (molar ratio) of ethanolamine , heated to 50°C, and reacted for 18h. Pour out liquids such as ethanol, add 100mL of 1mol / L sodium hydroxide solution, stir at room temperature for 2h, pour out the liquid, wash with water until neutral, and reflux extract with absolute ethanol for 24h. Vacuum dry. The obtained resin III has the following structural formula.

[0033] Add 5.0g of resin III to a 100mL four-necked flask equipped with a stirrer, a spherical condenser, and a thermometer, add 30mL of benzene dried over magnesium sulfate for 48 hours, and 5mL of pyridine dried over anhydrous potassium carbonate, and swell for 6 hours under ice-water bath conditions. 12mL of thionyl chloride was added dropwise, and the addition was complet...

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PUM

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Abstract

The invention discloses a novel strongly and weakly alkaline anion exchange resin with adsorption and ion exchange functions and a preparation method thereof, and relates to the field of anion exchange resin and a preparation process thereof. The novel anion exchange resin with the adsorption and ion exchange functions comprises a strong alkali group and a weak alkali group, the exchange capacityof strong alkali is 2.9 to 5.7meq for each gram of dry agent, and the exchange capacity of weak alkali is 2.8 to 3.2meq for each gram of dry agent. The preparation method of the resin comprises the following steps of: performing nucleophilic substitution reaction on macroporous chloromethylated polystyrene resin serving as a raw material and an alcohol amine compound, and reacting with thionyl chloride for further quaternization to obtain the strongly and weakly alkaline anion exchange resin.

Description

technical field [0001] The invention relates to a preparation process of an ion exchange resin, in particular to a strong and weak base anion exchange resin and a preparation process thereof. Background technique [0002] Anion exchange resins can be divided into strongly basic anion exchange resins and weakly basic anion exchange resins according to the nature of the exchange groups. Anion exchange resins have high strength, superior performance, and a wide range of uses, and can be used in biochemical separation, sewage treatment, phase transfer catalytic reagents, and other fields. In addition to conventional strongly basic anion exchange resins and weakly basic anion exchange resins, there are also bifunctional anion exchange resins. [0003] Marsh S.F. et al. synthesized a bifunctional base strong base anion exchange resin and achieved good results in the treatment of Pu in industrial wastewater. [0004] Chinese patent CN1712135 discloses a method for preparing a wea...

Claims

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Application Information

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IPC IPC(8): B01J41/14C08F212/08C08F8/44
Inventor 何明阳吴永琴陈群孙富安
Owner 溧阳常大技术转移中心有限公司
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