Preparation method of efficient PEI (polyethyleneimine) modified porous adsorption material and application

A porous adsorption material, polyethyleneimine technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to achieve suitable for large-scale production, simple synthesis process, and conducive to batch processing Effect

Inactive Publication Date: 2017-06-20
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the above studies use the method of grafting PEI onto the polymer chain to prepare the adsorption material, but there are few reports on the method of cross-linking the preparation of the adsorption material by using a small molecule cross-linking agent and PEI through a chemical reaction.

Method used

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  • Preparation method of efficient PEI (polyethyleneimine) modified porous adsorption material and application

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Effect test

Embodiment 1

[0017] Preparation of a porous material based on polyethyleneimine (PEI) and cyanuric chloride: 10 g of PEI was added into a 500 mL three-necked flask under heating and reflux reaction conditions, and fully dissolved with tetrahydrofuran. Stir and heat, and when the internal temperature reaches 70°C, start to slowly drop the tetrahydrofuran solution dissolved with cyanuric chloride into the reaction flask, and after the dropwise addition is completed, keep the reaction for 24 hours. After the reaction was completed, the reaction solution was poured into an ice bath to precipitate a crude product. After the crude product was processed several times, it was dried to obtain the product with a yield of 85.5%.

Embodiment 2

[0019]Preparation of a porous material based on polyethyleneimine (PEI) and biphenyl benzyl chloride: 10 g of PEI was added to a 500 mL three-necked flask under heating and reflux reaction conditions, and fully dissolved with tetrahydrofuran. Stir and heat, and when the internal temperature reaches 70°C, slowly add the tetrahydrofuran solution dissolved in biphenyl dibenzyl chloride into the reaction flask dropwise, after the dropwise addition is completed, keep the reaction for 24 hours. After the reaction was completed, the reaction solution was poured into an ice bath to precipitate a crude product. After the crude product was processed several times, it was dried to obtain the product with a yield of 65%.

Embodiment 3

[0021] According to the product of embodiment 1, it is compared to Cu 2+ Carry out adsorption experiment: Weigh 1g of adsorbent in a centrifuge tube, and add 100ml of 100 mg / L Cu 2+ The original solution was stirred at room temperature, and after adsorption for 0.5 h, the atomic absorption test was performed on the clear solution. The adsorption capacity is: 1 g adsorbent adsorbs 48.04 mg Cu 2+ .

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Abstract

The invention discloses a preparation method of an efficient PEI (polyethyleneimine) modified porous adsorption material and application. According to the process, the PEI and a cross linking agent are used for taking a reaction in an organic solvent; the mol ratio of the PEI to the cross linking agent is 1:(1 to 10), the reaction temperature is 0 to 100 DEG C, and the reaction time is 1 to 48 h; a product after the reaction is purified and dried to obtain a serious of porous adsorption material based on the PEI. For the adsorption quantity of the adsorption material on the copper ions, about 50mg Cu<2+> can be absorbed by 1g of adsorption agents; for the adsorption quantity on bisphenol A, about 24mg of bisphenol A can be absorbed by 1g of adsorption agents; for the adsorption on Lithol Red pigment wastewater, the COD value of the wastewater can be reduced from 1440 to 339; in addition, the color of the waste water is changed from dark red to colorless. The invention provides the preparation method with the advantages that the synthesis process is simple; the cost is low; the efficiency is high; safety and economy are realized; the reaction is mild; the operation is easy; the prepared PEI adsorption material has a good adsorption effect and is not dissolved in water; the recovery for repeated utilization can be realized; the mass treatment of the industrial wastewater can be facilitated; the preparation method is suitable for large-scale production; wide application and market prospects are realized.

Description

technical field [0001] The invention relates to a preparation method and application of a high-efficiency polyethyleneimine modified porous adsorption material. Background technique [0002] Adsorbent is a kind of material that uses its internal porous structure to absorb certain or several pollutants in wastewater, recycle or remove them, so as to purify wastewater. At present, the adsorbent has been widely used in the fields of chemical industry, environmental protection, medicine and health, and biological engineering. In terms of chemical industry and environmental protection, adsorbents are mainly used to purify waste gas, recover solvents and remove trace pollutants in water. Its application range includes decolorization, deodorization, removal of heavy metals, removal of various dissolved organic substances and radioactive elements, etc. The treatment of wastewater by adsorbent has the advantages of wide application range, good treatment effect, recyclable useful ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
CPCB01J20/265C02F1/288
Inventor 杨长安黄河王海南袁灿陈玲华杰唐课文周从山
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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