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High temperature resistant guanidine-based strong alkali resin and preparation method thereof

A high temperature-resistant, guanidine-based technology, applied in the field of polymer synthesis, can solve the problems of increased preparation difficulty, low conversion rate of chemical bonding reaction, instability, etc., to improve thermal stability, particle size uniformity, and temperature resistance. excellent effect

Active Publication Date: 2019-01-11
NANJING INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extremely unstable free guanidine is used in the preparation process of these guanidine-based resins, which increases the difficulty of preparation, and the conversion rate of the chemical bonding reaction between guanidine-based and chloromethyl groups is also low during the synthesis process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 10g of bismuth nitrate pentahydrate and 6g of aminoacetic acid and dissolve them in 250mL of deionized water, stir until clear and transparent, transfer to a microwave reactor, adjust the microwave power to 300W, and the time is 15min, cool to room temperature, centrifuge, separate with 1500g Washed with ethanol and deionized water, and dried in vacuum at 75°C for 10 h, the face cubic phase δ-Bi was obtained 2 o 3 ;

[0032]Take 10g face cubic phase δ-Bi 2 o 3 Add it to 150 g of KH570 isopropanol solution with a mass fraction of 1 wt%, react for 5 h under stirring, centrifuge, wash with 3500 g of ethanol, and dry in vacuum at 65 °C for 11 h to obtain hydrophobically modified δ-Bi 2 o 3 ;

[0033] Weigh 1g benzoyl peroxide, 125g solid paraffin, 250g styrene and 12g hydrophobically modified δ-Bi 2 o 3 Mix and stir evenly to obtain an oil phase reaction solution; then mix 2g hypromellose, 12g sodium chloride and 920g deionized water evenly to obtain a water ph...

Embodiment 2

[0038] Weigh 10g of bismuth nitrate pentahydrate and 10g of aminoacetic acid and dissolve them in 400mL of deionized water, stir until clear and transparent, transfer to a microwave reactor, adjust the microwave power to 400W, and the time is 7min, cool to room temperature, centrifuge, separate with 2500g Washed with ethanol and deionized water, and dried in vacuum at 85°C for 8 hours, the face cubic phase δ-Bi was obtained 2 o 3 ;

[0039] Take 10g face cubic phase δ-Bi 2 o 3 Add it to 300g of KH570 isopropanol solution with a mass fraction of 4wt%, react for 10h under stirring, centrifuge, wash with 6000g of ethanol, and dry in vacuum at 75°C for 9h to obtain hydrophobically modified δ-Bi 2 o 3 ;

[0040] Weigh 1g ammonium persulfate, 150g liquid paraffin oil, 400g styrene and 32g hydrophobically modified δ-Bi 2 o 3 Mix and stir evenly to obtain an oil phase reaction solution; then mix 2g hypromellose, 8g sodium chloride and 1000g deionized water evenly to obtain a wa...

Embodiment 3

[0045] Weigh 10g of bismuth nitrate pentahydrate and 5g of glycine and dissolve them in 250mL of deionized water, stir until clear and transparent, transfer to a microwave reactor, adjust the microwave power to 500W, and the time is 20min, cool to room temperature, centrifuge, separate with 5000g Washed with ethanol and deionized water, and dried in vacuum at 90°C for 12 hours, the face cubic phase δ-Bi was obtained 2 o 3 ;

[0046] Take 10g face cubic phase δ-Bi 2 o 3 Add it to 200g of KH570 isopropanol solution with a mass fraction of 2wt%, react for 7h under stirring, centrifuge, wash with 4000g of ethanol, and dry in vacuum at 60°C for 8h to obtain hydrophobically modified δ-Bi 2 o 3 ;

[0047] Weigh 1g azobisisobutyronitrile, 120g n-octanol, 200g styrene and 10g hydrophobically modified δ-Bi 2 o 3 Mix and stir evenly to obtain an oil phase reaction solution; then mix 2g hypromellose, 4g sodium chloride and 930g deionized water evenly to obtain a water phase reactio...

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Abstract

The invention discloses a high temperature resistant guanidine-based strong alkali resin and a preparation method thereof. The resin material is a core-shell structure compound. A core is a surface cubic phase delta-Bi2O3 and an outer shell is a guanidine-based strong alkali resin. The invention also provides a preparation method of the guanidine-based strong alkali resin. The preparation method comprises: preparing a surface cubic phase delta-Bi2O3 through a microwave reaction, carrying out surface hydrophobic modification on delta-Bi2O3 through KH570, coupling delta-Bi2O3 through KH570, carrying out suspension polymerization to obtain a polystyrene macroporous resin so that the delta-Bi2O3 resin white ball core-shell compound is prepared, the compound undergoes a chloromethylation reaction and the product undergoes a reaction with guanidine hydrochloride to produce the high temperature resistant guanidine-based strong alkali resin. The strong alkali resin has a large strong alkali exchange capacity and strong high temperature resistance and has potential application prospects in high temperature environments such as condensing water precision treatment and a catalytic reaction ofan air cooling unit.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and in particular relates to a high-temperature-resistant guanidine-based strong base resin and a preparation method thereof. Background technique [0002] Anion exchange resin is an important purification material used in the condensate polishing process of air-cooled units, and its performance will seriously affect the operation of the unit. However, the traditional polystyrene quaternary amine strong base resin is prone to the side reaction of Hoffman (Hoffman) degradation when heated. Especially in the high temperature season, the temperature of condensed water often exceeds the possible tolerance range of anion exchange resin, which leads to the weakening or even inactivation of the exchange group of anion exchange resin. Therefore, improving the thermal stability of polystyrene strong base resin will effectively improve the purification effect of condensate polishing in air-coole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F2/44C08F8/30C08F8/24C08J9/28C08K9/06C08K3/22B01J41/14
CPCB01J41/14C08F8/30C08F212/08C08J9/0066C08J9/009C08J9/28C08J2325/08C08K3/22C08K9/06C08F2/44C08F212/36C08F8/24
Inventor 王章忠张泽武卜小海钱平
Owner NANJING INST OF TECH
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