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Preparation method of strong base type ion exchanging fibers

A technology for exchanging fibers and alkali ions, which is applied in the field of preparation of ion exchange fibers to achieve the effects of convenient operation, maturity and stability, and simple reaction process.

Active Publication Date: 2018-04-13
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is: in order to overcome the technical problem of using the strong carcinogen chloromethyl ether to carry out the chloromethylation reaction in the existing method for preparing strong base exchanged ion fibers, the present invention provides a new preparation with The method of the strong alkali ion exchange fiber of technical equivalent exchange capacity, promptly the present invention provides a kind of preparation method of new strong alkali ion exchange fiber

Method used

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  • Preparation method of strong base type ion exchanging fibers
  • Preparation method of strong base type ion exchanging fibers
  • Preparation method of strong base type ion exchanging fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The preparation method of strong base ion exchange fiber of the present invention, the detailed steps of this preparation method are as follows:

[0038]a. First weigh 1.84g of polyphenylene sulfide fiber, that is, PPS fiber, and add it to the reaction bottle, then add 18.4ml of dichloroethane and let it stand for swelling for 48h. After swelling, add 0.92g (5mmol) cyanuric chloride and 1.305g (5mmol) ) anhydrous tin tetrachloride and stir evenly, then heat up to 60°C, and react for 48h under this temperature condition; Soak in HCl for 10 hours, extract with ethanol for 8 hours, wash with water until neutral, and dry in vacuum to constant weight (vacuum degree is 0.08Mpa, drying temperature is 60°C, drying time is 24 hours), and after drying, polyphenylene modified with cyanuric chloride is obtained. Sulfide fiber (relative to the original polyphenylene sulfide fiber, the weight gain of the modified fiber is 23%; after calculation, the amount of grafted cyanuric chlorid...

Embodiment 2

[0041] The preparation method of strong base ion exchange fiber of the present invention, the detailed steps of this preparation method are as follows:

[0042] a. First weigh 4.6g of PP-St-DVB fiber and add it to the reaction flask, then add 200ml of nitrobenzene and let it stand for swelling for 12h. After swelling, add 11.5g (62.5mmol) of cyanuric chloride and 10.14g (62.5mmol) of Ferric trichloride in water is ultrasonically dissolved, then heated to 120°C, and reacted at this temperature for 6 hours; after the reaction, cool to room temperature, filter, and filter out the obtained product, which is sequentially used with a concentration of 2mol / L Soak in HCl for 10 hours, extract with ethanol for 8 hours, wash with water to neutrality, and vacuum-dry to constant weight (vacuum degree is 0.08Mpa, drying temperature is 60°C, drying time is 24 hours), and after drying, PP-St modified by cyanuric chloride is obtained. -DVB fiber (compared to the original PP-St-DVB fiber, the ...

Embodiment 3

[0046] The preparation method of strong base ion exchange fiber of the present invention, the detailed steps of this preparation method are as follows:

[0047] a. First weigh 0.92g of PP-St-DVB fiber into the reaction bottle, then add 20ml of chloroform and let it stand for swelling for 6h, after swelling, add 2.76g (15mmol) of cyanuric chloride and 0.1g (7.5mmol) of anhydrous Aluminum trichloride is ultrasonically dissolved, then heated up to 60°C, and reacted at this temperature for 24 hours; after the reaction, cool to room temperature, filter, and filter out the obtained product, which is sequentially treated with HCl with a concentration of 2mol / L Soak for 10 hours, extract with ethanol for 8 hours, wash with water until neutral, and vacuum-dry to constant weight (vacuum degree is 0.08Mpa, drying temperature is 60°C, drying time is 24 hours), and after drying, PP-St- DVB fiber (compared to the original PP-St-DVB fiber, the weight gain of the modified fiber is 39%; after ...

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Abstract

The invention discloses a preparation method of strong base type ion exchanging fibers. The method comprises the following steps: adding base fibers to a reaction vessel; then adding a solvent A, andfully swelling; adding cyanuric chloride and a catalyst after swelling; uniformly stirring and heating to react; cooling until room temperature is reached after reaction; filtering to obtain a product; sequentially processing the obtained product by soaking, extracting, washing with water and drying to obtain cyanuric chloride modified fibers; adding the cyanuric chloride modified fibers to a solvent B to fully swell; then sequentially adding a functional agent and an acid-binding agent after swelling; uniformly stirring and heating; cooling until room temperature is reached after reaction; filtering to obtain a product; sequentially processing the obtained product by soaking, extracting, washing with water and drying to obtain the strong base type ion exchanging fibers. According to the method for preparing the strong base type ion exchanging fibers, the use defect that strong cancerogenic substances such as chloromethyl ether are used in chloromethylation process in the prior art canbe effectively avoided.

Description

1. Technical field: [0001] The invention relates to a preparation method of an ion exchange fiber, in particular to a preparation method of a novel strong alkali ion exchange fiber. 2. Background technology: [0002] Ion exchange fiber has the advantages of fast adsorption speed, high purification rate, stable osmotic pressure, and can be woven into various fabric forms. It has a wide range of applications in many fields such as harmful gas purification, heavy metal wastewater treatment, ultrapure water preparation, and seawater desalination. Prospects; especially strong alkali ion exchange fibers, which have strong ion exchange capacity and a wide range of applications, have received more attention. So far, the methods used to prepare strong base ion exchange fibers mainly include grafting copolymers of styrene and divinylbenzene onto polypropylene fibers by irradiation, followed by chloromethylation and quaternary amines. Using the "islands in the sea" type composite fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/358D06M13/328D06M13/352D06M13/432B01J43/00C02F1/42B01D53/02C02F101/22D06M101/30D06M101/18
CPCB01D53/02B01J43/00C02F1/42C02F2101/22D06M13/328D06M13/352D06M13/358D06M13/432D06M2101/18D06M2101/30
Inventor 黄佳佳炊宁博李奕帆王景涛牛聪马楠原思国
Owner ZHENGZHOU UNIV
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