Preparing method for acid cation exchange fibers

A technology of acidic cation and fiber exchange, applied in cation exchange materials, separation methods, chemical instruments and methods, etc., can solve the problems of wide application limitations, poor mechanical stability, low adsorption capacity, etc., and achieve large adsorption capacity and high adsorption speed Fast, large specific surface effect

Inactive Publication Date: 2016-12-14
MAANSHAN ZHONGCHUANG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used adsorption materials are activated carbon, activated alumina and ion exchange resin, etc., although they can effectively adsorb various pollutants, but due to their low adsorption capacity, slow adsorption speed and poor mechanical stability etc., making its wide application limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Add 20g of polypropylene fiber to 150ml of ethylene glycol, and add 40g of diethylenetriamine, and react under reflux under stirring. The product is washed with water and dried to obtain pretreated polypropylene fiber, which is ready for use.

[0019] 2. Soak 1g of pretreated polypropylene fibers in 40mL of aqueous solution containing 0.1g of ferrous ammonium sulfate and 10g of acrylamide, pass nitrogen gas for 15min, and perform grafting reaction in 80°C water bath for 6h; remove acrylamide monomer after the reaction , the product was washed three times with water, washed twice with 1% hydrochloric acid aqueous solution, and finally washed with water until neutral, and kept in a vacuum oven at 70°C for 24 hours to obtain a weakly basic ion exchange fiber.

Embodiment 2

[0021] 1. Add 25g of polypropylene fiber to 165ml of ethylene glycol, and add 35g of diethylenetriamine, and react under reflux under stirring. The product is washed with water and dried to obtain pretreated polypropylene fiber, which is ready for use.

[0022] 2. Soak 1.5g of pretreated polypropylene fiber in 32mL aqueous solution containing 0.08g of ferrous ammonium sulfate and 8g of acrylamide, blow nitrogen gas for 15min, and perform grafting reaction in 80°C water bath for 6h; after the reaction, remove acrylamide The product was washed three times with water, washed three times with 3% sulfuric acid solution, and finally washed with water until neutral, and kept in a vacuum oven at 70°C for 24 hours to obtain a weakly basic ion exchange fiber.

Embodiment 3

[0024] 1. Add 22g of polypropylene fiber to 130ml of ethylene glycol, and add 45g of diethylenetriamine, and react under reflux under stirring. The product is washed with water and dried to obtain pretreated polypropylene fiber, which is ready for use.

[0025] 2. Soak 1.2g of pretreated polypropylene fiber in 36mL aqueous solution containing 0.09g of ferrous ammonium sulfate and 9g of acrylamide, blow nitrogen gas for 15min, and perform grafting reaction in 80°C water bath for 6h; after the reaction, remove acrylamide The product was washed three times with water, twice with 5% nitric acid aqueous solution, and finally washed with water until neutral, and kept in a vacuum oven at 70°C for 24 hours to obtain a weakly basic ion exchange fiber.

[0026] Step 1 in the above examples can also be replaced by the following steps: wash the polypropylene fiber with acetone, dry it in vacuum at 80°C for 3 hours, place the dried polypropylene fiber in a sulfuric acid paper bag and accept...

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PUM

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Abstract

The invention discloses a preparing method for acid cation exchange fibers. The preparing method comprises the following steps that polypropylene fibers are added into a proper amount of organic alcohol, diethylenetriamine is added, a reflux reaction is carried out in a stirring state, a product is washed with water and aired, and pretreated polypropylene fibers are obtained; the pretreated polypropylene fibers are soaked in an aqueous solution system including ammonium ferrous sulfate and acrylamide, nitrogen is introduced for 15 min, and a grafting reaction is carried out in a water bath at 80 DEG C; acrylamide monomers are removed after the reaction is finished, a product is washed with water and acid in sequence, and finally washed with water to be neutral, the product is dried to reach a constant weight, and alkalescence ion exchange fibers are obtained. Polypropylene fibers are selected to carry out irradiation modification on the alkalescence ion exchange fibers, and acid gas such as SO2, HCl, Cl2 and HF and anion organic pollutants in a water phase can be effectively adsorbed; besides, the adsorption speed is high, and the adsorption capacity is large.

Description

technical field [0001] The invention belongs to the field of preparation of fiber materials, in particular to a preparation method of acidic cation exchange fibers. Background technique [0002] Ion exchange fiber is a fibrous ion exchange material. When the ion exchange fiber is in contact with the electrolyte solution, the ions on the fiber can be selectively exchanged with the ions in the solution. It is divided into cation exchange fibers, anion exchange fibers and amphoteric ion exchange fibers. Ion exchange fiber can be used to adsorb heavy metals and pigments. As a new functional polymer material, it has unique chemical and physical adsorption and separation properties, and has an irreplaceable role in some related fields. Adsorbent materials have become a research hotspot in the field of environmental pollution control technology because of their large surface area, fast ion exchange speed, easy regeneration, and wide applicability. [0003] Adsorption filtration i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/26B01D39/20B01D53/02C02F1/28C02F101/30
CPCB01J20/261B01D53/02B01D2257/2025B01D2257/2045B01D2257/2047B01D2257/302B01J20/265B01J39/20C02F1/285C02F2101/30
Inventor 朱小平陈婉芳陆启湖李健周钰明强金凤吴云李杰邓炳波卢珊珊
Owner MAANSHAN ZHONGCHUANG ENVIRONMENTAL PROTECTION TECH CO LTD
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