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Preparation method of magnetic polymer dye adsorbent

A technology of polymers and adsorbents, applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as difficult separation and secondary pollution, achieve improved compatibility, reduce input costs, The effect of the method is simple and easy

Active Publication Date: 2017-11-24
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, magnetic nanoparticles were prepared by improved chemical co-precipitation method, and then the surface was modified with γ-chloropropyltrimethoxysilane and polyethyleneimine respectively to obtain polyethyleneimine-modified magnetic nanoparticles. Ethyleneimine modified magnetic nanoparticles and functional monomers are copolymerized to prepare a magnetic polymer dye adsorbent with a multi-layered cross-linked structure and a variety of dye adsorption groups. Through polyethyleneimine modified magnetic nanoparticles, the improvement The compatibility of magnetic nanoparticles and polymer matrix, through the physical entanglement and hydrogen bonding of polyethyleneimine macromolecular chains grafted on the surface of magnetic nanoparticles and polymer matrix, avoids the agglomeration of magnetic nanoparticles and inhibits the magnetic nanoparticles. The macroscopic phase separation of particles and polymer matrix realizes the magnetic intelligent separation of magnetic polymer dye adsorption, which better solves the disadvantages of difficult solid-liquid separation and easy secondary pollution of ordinary dye adsorbents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 19.6g FeCl3 6H2O and 7.2g FeCl2 4H2O and 150mL deionized water into a three-necked flask, stir evenly, and heat up to 60°C after nitrogen protection for 30min, then add 50g of ammonia solution with a mass concentration of 25-30% dropwise, After the ammonia solution was added dropwise, react at a constant temperature under nitrogen protection for 5 hours, cool down to room temperature, wash with deionized water three times, and separate with a magnet to obtain magnetic nanoparticles; 1g of magnetic nanoparticles, 2g of γ-chloropropyltrimethoxysilane and 100mL of deionized Add water into the three-necked flask and stir evenly, heat up to 60°C after nitrogen protection for 30 minutes, then add dropwise 2 g of ammonia solution with a mass concentration of 25-30%, react at constant temperature under nitrogen protection for 5 hours, cool down to room temperature, and wash with deionized water for 5 times. Magnet separation to obtain chloropropyl modified nano magnetic part...

Embodiment 2

[0035] Add 30g FeCl3 6H2O and 10g FeCl2 4H2O and 200mL deionized water into a three-necked flask, stir evenly, protect with nitrogen for 30 minutes, then raise the temperature to 70°C, then add 60g of ammonia solution with a mass concentration of 25-30% dropwise, and add the ammonia solution dropwise After completion, the reaction was carried out under constant temperature under nitrogen protection for 4 hours, cooled to room temperature, washed with deionized water for 5 times, and separated by a magnet to obtain magnetic nanoparticles; 5g of magnetic nanoparticles, 15g of γ-chloropropyltrimethoxysilane and 200mL of deionized water were added to the three-hole Stir evenly in the flask, heat up to 70°C after nitrogen protection for 30 minutes, then add dropwise 15 g of ammonia solution with a mass concentration of 25-30%, react at constant temperature under nitrogen protection for 4 hours, cool down to room temperature, wash with deionized water for about 5 times, and separate w...

Embodiment 3

[0038] Add 10g FeCl3 6H2O and 5g FeCl2 4H2O and 100mL deionized water into a three-necked flask, stir evenly, protect with nitrogen for 30 minutes, then raise the temperature to 80°C, then add 25g of ammonia solution with a mass concentration of 25-30% dropwise, and add the ammonia solution dropwise After completion, the reaction was carried out at constant temperature under nitrogen protection for 3 hours, cooled to room temperature, washed with deionized water for 4 times, and separated by a magnet to obtain magnetic nanoparticles; 3 g of magnetic nanoparticles, 8 g of γ-chloropropyltrimethoxysilane and 150 mL of deionized water were added to the Stir evenly in the flask, heat up to 80°C under nitrogen protection for 30 minutes, then add dropwise 10 g of ammonia solution with a mass concentration of 25 to 30%, react at a constant temperature under nitrogen protection for 3 hours, then cool down to room temperature, wash with deionized water for 3 times, and separate with a mag...

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Abstract

The invention relates to a preparation method of a magnetic polymer dye adsorbent. An improved chemical co-precipitation method is adopted to prepare magnetic nano particles. Then the surface of nano particles is modified by using gamma-chloropropyl trimethoxysilane and polyethyleneimine to obtain polyethyleneimine modified magnetic nano particles. Finally, polyethyleneimine modified magnetic nano particles and functional monomers carry out copolymerization to prepare the magnetic polymer dye adsorbent with a multilayer crosslinking structure and multiple adsorption groups. The saturation magnetization intensity is 3.5 to 15.5 emu / g. The residual magnetism and coercive force are close to zero. The dye adsorbent has para-magnetism and magnetic responsiveness. For a dye water solution with a primary concentration of 100 to 1000 mg / L, the dye adsorption capacity can reach 50 to 600 mg / g; and the adsorption balance is reached within 60 to 150 minutes. After the dye adsorbent is repeatedly used for five times, the dye adsorption capacity exceeds 90% of first adsorption capacity. The dye adsorbent can be applied to dye adsorption separation and dye wastewater pollution treatment.

Description

1. Technical field [0001] The invention relates to a preparation method of a magnetic polymer dye adsorbent. The magnetic polymer dye adsorbent prepared by the invention is suitable for the adsorption and separation of dyes, and can be widely used in dye adsorption, dye separation and purification, and dye environmental pollution control. 2. Background technology [0002] Dye wastewater mainly comes from dye and dye intermediate production industries and different industries such as textile, leather, paper, rubber, plastic, cosmetics, pharmaceuticals and food. It has complex composition, large changes in water quantity and quality, high chroma, COD and BOD concentration It is one of the most difficult industrial wastewater to treat due to the characteristics of high concentration, high suspended solids, and many refractory biodegradable substances. In addition, dye wastewater not only has obvious chroma, which affects the senses, but also contains toxic and harmful pollutant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/264B01J20/28009C02F1/285C02F2101/308
Inventor 万涛唐利彭睿廉熊静王艳芬周玉海刘玥莹卿欢
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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