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Polymeric adsorbent and preparation method thereof

A technology for adsorbing resins and reaction products, applied in chemical instruments and methods, and other chemical processes, can solve problems such as complex processes and carcinogenicity, and achieve the effects of simple preparation methods, increased adsorption capacity, and small pore size

Active Publication Date: 2010-12-15
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The synthetic method of above-mentioned method is owing to adopt porogen, so process is complicated, and reagent chloromethyl ether used has serious carcinogenic effect

Method used

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  • Polymeric adsorbent and preparation method thereof

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preparation example Construction

[0024] The invention discloses a preparation method of an adsorption resin, comprising;

[0025] reacting chloromethylstyrene, divinylbenzene and benzoyl peroxide in an aqueous solution of polyvinyl alcohol to obtain a first reaction product;

[0026] The first reaction product is swelled in an organic solvent at 70-90° C., and the second reaction product is obtained after adding a catalyst for reaction, and the catalyst is aluminum chloride, ferric chloride, zinc chloride or tin chloride;

[0027] The second reaction product is reacted with the hydroxyl group-containing monomer at a constant temperature of 70-90° C. to obtain an adsorption resin.

[0028] The divinylbenzene is a crosslinking agent, the chloromethylstyrene is a reactive monomer, and the molar ratio of the divinylbenzene to the chloromethylstyrene is preferably 1 to 5:100, more preferably It is 3~5:100. The benzoyl peroxide is an initiator, and the mass ratio of the chloromethylstyrene to the benzoyl peroxide...

Embodiment 1

[0039] The crosslinking agent divinylbenzene and monomer chloromethylstyrene are added to the PVA solution with a mass concentration of 0.9 wt%, and the molar ratio of the divinylbenzene to the chloromethylstyrene is 3:100 , add the initiator benzoyl peroxide of 0.66wt% monomer quality again, 80 ℃ of reactions 6 hours after stirring, obtain beaded resin, the infrared spectrogram of described beaded resin is as follows figure 1 As shown in the middle B curve;

[0040]The obtained bead-shaped resin was washed several times with deionized water at 60° C., filtered and extracted with suction, and dried under vacuum. Swell 1 g of the obtained resin in 40 ml of 1,2-dichloroethane overnight, add catalyst aluminum chloride to resin mass ratio of 1:3, stir well and react at 80° C. for 6 h, then add 10 wt % of resin mass. Polarity-modified monomer phenol, reacted at 80°C for 6 hours, filtered, then washed with hydrochloric acid-acetone solution, then washed with acetone solution, extra...

Embodiment 2

[0043] The crosslinking agent divinylbenzene and monomer chloromethylstyrene are added to the PVA solution with a mass concentration of 1.1 wt%, and the molar ratio of the divinylbenzene to the chloromethylstyrene is 5:100 , then add 0.66wt% monomer mass initiator benzoyl peroxide, stir evenly and react at 80°C for 6 hours to obtain bead-like resin;

[0044] The obtained bead-shaped resin was washed several times with deionized water at 60° C., filtered and extracted with suction, and dried under vacuum. Swell 1 g of the obtained resin in 40 ml of 1,2-dichloroethane overnight, add catalyst ferric chloride to resin mass ratio of 1:5, stir evenly and react at 80° C. for 6 h, then add 0.5 wt % of resin mass. Polarity-modified monomer nitrophenol, reacted at 80°C for 7 hours, filtered, then washed with hydrochloric acid-acetone solution, then washed with acetone solution, extracted, and vacuum-dried to obtain a polar high specific surface area adsorption resin.

[0045] The obtai...

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Abstract

The embodiment of the invention discloses a polymeric adsorbent and a preparation method thereof. The preparation method comprises the following steps of: preparing a bead-like resin from chloromethyl styrene serving as a polymerization monomer and divinyl benzene serving as a cross-linking agent by a suspension polymerization method; and adding a hydroxyl-containing monomer at the post-crosslinking stage to perform super cross-linking reaction so as to prepare the polymeric adsorbent. In the method, pores are formed in the polymeric adsorbent at the post-crosslinking stage of polychloromethyl styrene by using a chemical modification method, and polar groups are formed on the frame of the polymeric adsorbent by introducing the hydroxyl-containing monomer for modification, so the adsorption of an adsorbent substance by the polymeric adsorbent is increased. The preparation method provided by the invention is simple and the substances harmful to human body such as chloromethyl ether and the like and pore-forming agents are not used in the method. Experimental results show that the polymeric adsorbent prepared by the invention has the advantages of high specific surface area, small aperture, high adsorption selectivity and particularly high capacity of absorbing aromatic compounds.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and more specifically relates to an adsorption resin and a preparation method thereof. Background technique [0002] Adsorption resin, also known as polymer adsorbent, is a highly cross-linked polymer with a porous three-dimensional structure. It is a porous resin developed in the field of polymers in recent years. It is widely used in ecological environment, biomedicine, chemical industry and other fields. The adsorption resin has a large specific surface area and appropriate pore size, and can adsorb certain substances from the gas phase or solution. At present, the synthesis of polymer adsorption resins with high specific surface area, controllable pore structure, and specific polarity is a research hotspot in materials chemistry. [0003] So far, adsorption resins are generally prepared by suspension polymerization of monomers and cross-linking agents in the presence of porogens. ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
Inventor 王丕新王海志徐昆刘畅谭颖
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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