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Method for controlloing oxygen containing functional group in surface in synthesizeing adsorptive resin of crosslinked polystyrene

A technology of cross-linked polystyrene and adsorption resin, applied in the direction of adsorption water/sewage treatment, etc., can solve the problem of lack of control and adjustment of oxygen-containing functional groups, and achieve the effect of simple equipment and simple control method.

Inactive Publication Date: 2006-12-06
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Literature search shows that although the existence of oxygen-containing functional groups has been reported, the mechanism of these oxygen-containing functional groups and how to control the formation of these groups during the synthesis process have not been reported in the literature, so it is not available in the synthesis process. Ability to control and regulate generation of oxygen-containing functional groups

Method used

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  • Method for controlloing oxygen containing functional group in surface in synthesizeing adsorptive resin of crosslinked polystyrene
  • Method for controlloing oxygen containing functional group in surface in synthesizeing adsorptive resin of crosslinked polystyrene

Examples

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Effect test

Embodiment 1

[0021] 1. Suspension polymerization

[0022] Add a certain amount of dilute sodium hydroxide solution to the styrene monomer or directly filter the monomer through a resin column equipped with a strong base anion exchange resin to remove the polymerization inhibitor, and use it after passing the inspection.

[0023] In a 1000mL beaker, add 200g styrene, 25g divinylbenzene, and 125g liquid paraffin, stir well and set aside.

[0024] In a 1000mL three-neck flask, add 600mL of pure water, raise the temperature to 40°C, then add 6g of gelatin, then raise the temperature to 50°C, and stir until the gelatin is completely dissolved. Add 2mL of methylene blue, stir evenly, then add the above mixture of styrene, divinylbenzene and paraffin, and add 4g of benzoyl peroxide. Adjust the appropriate stirring speed to make the size of the oil droplet suitable, raise the temperature to 80°C at a rate of 6°C for 1 minute and keep it warm for 4 hours, then raise the temperature to 85°C and kee...

Embodiment 2

[0033] 1. Using styrene as a monomer, divinylbenzene as a crosslinking agent, liquid wax as a porogen, gelatin as a dispersant, benzoyl peroxide as an initiator, and suspension polymerization to synthesize low crosslinking The macroporous styrene-divinylbenzene copolymer is extracted with ethanol as a solvent to remove the porogen remaining in the resin pores, and vacuum-dried to obtain white balls.

[0034] The amount of the porogen used is 40% of the monomer weight, and the cross-linking degree of the low-crosslinked macroporous polystyrene is 2%.

[0035] 2. Soak the white ball in 4 times the weight of chloromethyl ether, add zinc chloride with 30% of the weight of the white ball as a catalyst, carry out chloromethylation at 30°C, stop the reaction until the chlorine content reaches 18%, and filter out the resin spheres, wash the remaining chlorinated mother liquor in the resin with water, and vacuum-dry to obtain chlorine spheres.

[0036] 3. Swell chlorine balls in nitro...

Embodiment 3

[0041] 1. Using styrene as a monomer, diethylene as a crosslinking agent, liquid wax as a porogen, magnesium carbonate as a dispersant, benzoyl peroxide as an initiator, and suspension polymerization to synthesize low crosslinking The macroporous styrene-divinylbenzene copolymer is extracted with ethanol as a solvent to remove the porogen remaining in the resin pores, and vacuum-dried to obtain white balls.

[0042] Wherein the amount of the porogen is 100% of the monomer weight, and the cross-linking degree of the low-crosslinked macroporous polystyrene is 2%.

[0043] 2. Soak the ball in 7 times the weight of chloromethyl ether, add zinc chloride with 50% of the weight of the white ball as a catalyst, carry out chloromethylation at 40°C, stop the reaction until the chlorine content reaches 18%, and filter out the resin ball , wash the remaining chlorinated mother liquor in the resin with water, and dry in vacuum to obtain chlorine balls.

[0044] 3. Swell chlorine balls in ...

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Abstract

This invention discloses a method for controlling the oxygen-containing functional groups on the surface of crosslinked polystyrene adsorption resins. The method uses styrene as the monomer, divinylbenzene as the crosslinking agent, liquid wax as the pore-forming agent, magnesium carbonate as the dispersant, and benzoyl peroxide as the initiator. The method comprises: (1) preparing macroporous styrene-divinylbenzene copolymer resins with a low crosslinking degree; (2) chloromethylating to obtain chloromethylated macroporous styrene-divinylbenzene copolymer resin balls; (3) swollening in nitrobenzene, adding the catalyst, introducing nitrogen, oxygen or air, and reacting to obtain crosslinked styrene-divinylbenzene copolymer resins having carbonyl, hydroxyl, ester or carboxyl on the surface. The resins can be used to treat industrial wastewater or extract drugs. The method has such advantages as simple process and simple equipment.

Description

1. Technical field [0001] The invention relates to an adsorption resin and a synthesis method thereof, in particular to a method capable of controlling the generation of oxygen-containing functional groups on the surface as required. 2. Background technology [0002] Since Davankov developed cross-linked polystyrene, cross-linked polystyrene adsorption resin has been widely used in the fields of industrial wastewater treatment, drug extraction, and chromatographic technology, but its research mainly focuses on applied research, while its surface chemistry However, studies on adsorption theory are still insufficient. For a long time, it has been believed that cross-linked polystyrene adsorption resin has no polar functional groups on the surface, and is a non-polar adsorbent with hydrophobic surface. The high adsorption capacity comes from the high specific surface area of ​​the resin. The adsorption mechanism is the interaction between the adsorbent and the adsorbate skeleto...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F2/08C08F4/34C02F1/28
Inventor 李爱民孟冠华张海云杨维本吴林杨鑫朱兆连杨立成王春刘福强张全兴
Owner NANJING UNIV
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