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Strong-base anion exchange resin with tentacle quaternary ammonium chain structure

An exchange resin and strong basic technology, which is applied in the field of quasi-homogeneous strong basic anion exchange resin and its synthesis, can solve the problems of secondary cross-linking, multiple substitutions, uncontrollable, etc., and achieve easy adsorption, good extensibility, good affinity effect

Inactive Publication Date: 2013-09-25
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are many disadvantages in this method: firstly, the reaction raw material chloromethyl ether or dichloromethyl ether has a strong carcinogenic effect, and was listed as a banned reagent in factories internationally in 1967
Secondly, the chloromethylation reaction also has the problems of multiple substitutions and secondary crosslinking, which makes the structure of the chloromethylation resin complex and uncontrollable.
Third, most of these quaternary ammonium groups are directly and rigidly bonded to the surface interface of the matrix microspheres, which are negatively affected by their steric hindrance and have poor freedom of functional groups, hindering diffusion and interaction

Method used

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  • Strong-base anion exchange resin with tentacle quaternary ammonium chain structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Synthetic conditions: take by weighing 1.0070g epoxy resin and 4.8526g triethylamine hydrochloride in the ratio of n (epoxy resin): n (triethylamine hydrochloride)=1:5 and add to 25mL agitating circle In the bottom flask, add 4 mL of water at the same time, mix the solution, add triethylamine dropwise to adjust the pH to 8.5, and react at 80 ° C for 10 h. After the reaction was finished, cool and filter, the product was washed and filtered with deionized water for 5 times and ethanol for 3 times, then vacuum-dried at 40°C to constant weight to obtain 1.3433g of flex-AIQ-R resin with a weight gain of 33.64%. The conversion rate of quaternary ammonium group into quaternary ammonium group was 44.4%, and the loading amount of quaternary ammonium group was 1.84mmol / g.

Embodiment 2

[0015] Synthetic conditions: take by weighing 1.0020g epoxy resin and 4.8118g triethylamine hydrochloride in the ratio of n (epoxy resin): n (triethylamine hydrochloride)=1:5 and add to 25mL agitating circle In the bottom flask, add 0.2033g of cetyltrimethylammonium bromide (CTAB) (4%) and 4mL of water at the same time. After the solution is mixed, triethylamine is added dropwise to adjust the pH to 9, and react at 60°C for 14h. After the reaction, cool and filter, the product was washed and filtered with deionized water for 5 times and ethanol for 3 times, then vacuum-dried at 40°C to constant weight to obtain 1.4467g of flex-AIQ-R resin with a weight gain of 44.31%. The conversion rate of quaternary ammonium group into quaternary ammonium group was 58.5%, and the loading amount of quaternary ammonium group was 2.23mmol / g.

Embodiment 3

[0017] Synthetic conditions: take by weighing 1.0017g epoxy resin and 9.6355g triethylamine hydrochloride in the ratio of n (epoxy resin): n (triethylamine hydrochloride) = 1: 10 and add to 25mL agitating circle In the bottom flask, add 0.0345g tetramethylethylenediamine (TMEDA) (2%) and 7mL 28.57% ethanol-water solution at the same time. After the solution is mixed, triethylamine is added dropwise to adjust the pH to 9, and react at 80°C for 10h. After the reaction, cool and filter, the product was washed and filtered with deionized water for 5 times and ethanol for 3 times, then vacuum-dried at 40°C to constant weight to obtain 1.5344g of flex-AIQ-R resin with a weight gain of 52.2%. The conversion rate of quaternary ammonium group into quaternary ammonium group was 68.9%, and the loading amount of quaternary ammonium group was 2.48mmol / g.

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Abstract

The invention discloses a strong-base anion exchange resin (flex-AIQ-R) with a tentacle quaternary ammonium chain structure, belonging to the field of macromolecule synthesis. The strong-base anion exchange resin with the tentacle quaternary ammonium chain structure can be obtained by reacting tentacle-shaped epoxy resin with triethylamine hydrochloride through one-step quaternization. The flex-AIQ-R with the quaternary ammonium group loading capacity of 0.3-3.5mmol / g can be controllably obtained by changing the reaction conditions.

Description

(1) Technical field [0001] The invention relates to a quasi-homogeneous strongly basic anion exchange resin and a synthesis method thereof, in particular to a strongly basic anion exchange resin with an antennae-like quaternary ammonium chain structure, namely flex-AIQ-R, and a synthesis method thereof. (2) Background technology [0002] At present, ion exchange resins have been widely used in various industrial sectors, and the development and research of new ion exchange resins has far-reaching significance. Polystyrene has been widely used as a polymer carrier. Polystyrene-type strong basic anion exchange resin has the advantages of excellent performance, recyclable regeneration, and convenient transformation. It can be widely used in sewage treatment, enzyme immobilization, phase transfer catalyst, extraction of biologically active substances, drugs such as streptomycin And the separation and purification of amino acids and other fields. [0003] Quaternary ammonium ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F220/32C08F220/56C08F220/14C08F8/44B01J41/14
Inventor 刘晓宁丁凌鹏魏荣卿
Owner NANJING UNIV OF TECH
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