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Synthesis of composite functional super high cross-linked adsorbing resin containing sulfo radical

A composite function, adsorption resin technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of low specific surface area, poor adsorption performance of organic matter, and no synthetic method of ultra-high cross-linked adsorption resin. The effect of the application foreground

Inactive Publication Date: 2006-05-17
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The macroporous or gel-type cation exchange resins containing sulfonic acid groups have been widely used in the removal of metal ions (such as water softening), but the specific surface area of ​​these resins is usually very low, and the adsorption performance of organic matter is very poor.
Literature search shows that there is no synthesis method of composite functional ultra-high cross-linked adsorption resin containing sulfonic acid groups and rich micropores in the existing literature reports.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. Suspension polymerization.

[0015] 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.

[0016] In a 1000mL beaker, add 210g styrene, 26g divinylbenzene, and 140g liquid paraffin, stir well and set aside.

[0017] In a 1000mL three-neck flask, add 600g of distilled water and heat up to 40°C, then add 6g of gelatin, stir until completely dissolved, and at the same time raise the temperature to 50°C, add 2mL of methylene blue, stir evenly, add the above-mentioned styrene, divinylbenzene and liquid For the wax mixture, add 4.0g of initiator benzoyl peroxide; adjust the stirring speed to make the oil droplet size appropriate, gradually raise the temperature to 80°C at a speed of 1°C / 6min, keep it warm for 4 hours, and then gradually raise the temperature to 85°C Keep warm for 3 hours, keep warm at 90°...

Embodiment 2

[0030] The synthetic steps of another embodiment of the present invention are as follows:

[0031] A) Using styrene as monomer, divinylbenzene as crosslinking agent, liquid wax as porogen, magnesium carbonate as dispersant, benzoyl peroxide as initiator, and suspension polymerization Linked macroporous styrene-divinylbenzene copolymer, steam distillation or extraction with ethanol as a solvent to remove the porogen remaining in the resin channels, and then air-dried to obtain low-crosslinked macroporous polystyrene-divinylbenzene Vinyl styrene resin; that is, white balls.

[0032] Wherein the amount of the porogen is 40% of the monomer weight, and the cross-linking degree of the low-crosslinked macroporous polystyrene is 2%.

[0033] B) Soak the white ball in chloromethyl ether which is 4 times its weight, add 20% zinc chloride of the white ball weight as a catalyst, and carry out chloromethylation reaction at a temperature of 36-42°C until the chlorine content reaches more t...

Embodiment 3

[0038] The synthetic steps of another embodiment of the present invention are as follows:

[0039] A) Use styrene as a monomer, divinylbenzene as a crosslinking agent, use No. 200 solvent oil as a porogen, and use gelatin (or polyvinyl alcohol, or a mixture of magnesium carbonate, gelatin, and polyvinyl alcohol) As a dispersant, benzoyl peroxide is used as an initiator, and a low-crosslinking macroporous styrene-divinylbenzene copolymer is synthesized by a suspension polymerization method, and ethanol (or acetone, or industrial alcohol, or low-boiling point solvent gasoline is used) ) for solvent extraction to remove the porogen remaining in the resin channels, and then air-dried to obtain low-crosslinked macroporous polystyrene-divinylbenzene resin; that is, white balls.

[0040] Wherein the amount of the porogen is 100% of the monomer weight, and the crosslinking degree of the low-crosslinked macroporous polystyrene is 10%.

[0041] B) Soak the white ball in chloromethyl et...

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PUM

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Abstract

The present invention discloses the synthesis of composite functional super high cross-linked adsorbing resin containing sulfo radical. The synthesis process of the present invention adopts styrene as monomer, divinyl benzene as cross-liking agent, liquid paraffin and other material as pore creating agent, magnesium sulfate and other material as dispersant, benzoyl peroxide as initiator, nitrobenzene and dichloro ethane or chloroben as sweller, and zinc chloride, ferric trichloride or tin tetrachloride and Lewis acid as catalyst, and prepares composite functional resin through preparing chloromethylated low cross-linked polystyrene resin, post-crosslinking reaction to obtain composite functional resin precursor of different crosslinking degree and final sulfonating with high concentration sulfuric acid to obtain composite functional resin with different specific surface area and different exchange capacity. The resin product has both adsorption and ion exchange function and thus wide application range.

Description

1. Technical field [0001] The invention relates to a method for synthesizing an ultra-high cross-linking adsorption resin, in particular to a preparation method for an ultra-high cross-linking adsorption resin with composite functions containing sulfonic acid groups. 2. Background technology [0002] The super high cross-linked adsorption resin containing sulfonic acid groups with composite functions of adsorption and ion exchange has the following mechanism: on the one hand, ion exchange (or Electrostatic interaction); on the other hand, hydrophobic adsorption is performed between the hydrophobicity of the resin itself and the hydrophobic part of the organic matter. Therefore, it can be effectively used in drug extraction, removal of complex pollutants (metal ions and organic pollutants) in micro-polluted water source water, and adsorption and separation fields such as wastewater treatment. The macroporous or gel-type cation exchange resins containing sulfonic acid groups ...

Claims

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Application Information

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IPC IPC(8): C08F212/08B01J20/26C08F2/44C08F212/36
Inventor 李爱民蔡建国孟冠华杨维本张海云蒋珍茂葛俊杰张晓王津南杨立成张全兴
Owner NANJING UNIV
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