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Imidazole modified high-crosslinked resin as well as preparation method and application thereof

A high cross-linking, resin technology, used in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. Complex process and other problems, to achieve the effect of good reuse performance, improved raw material utilization and yield, and fast adsorption rate

Pending Publication Date: 2022-01-11
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing common wastewater treatment methods generally have four major pain points: simple physical adsorption method has high cost and inconvenient management for wastewater treatment; chemical adsorption method has complicated treatment process and product production process; biosorption method has low adsorption rate and slow adsorption rate

Method used

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  • Imidazole modified high-crosslinked resin as well as preparation method and application thereof
  • Imidazole modified high-crosslinked resin as well as preparation method and application thereof
  • Imidazole modified high-crosslinked resin as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] This embodiment provides a preparation method of imidazole modified highly cross-linked resin, comprising the following steps:

[0032] S1. 20 g of macroporous chloromethylated polystyrene (CMPs, Cl%: 17.3 wt.%) was swelled in 120 mL of 1,2-dichloroethane (DCE) at room temperature overnight, and 4.0 g of anhydrous FeCl was added 3 as a catalyst. The reaction was carried out at 80°C for 30 min. After the polymer was filtered, it was washed sequentially with hot water, absolute ethanol, 1% dilute hydrochloric acid, and absolute ethanol, dried at low temperature, extracted with ethanol Soxhlet for 12 h, and vacuum-dried at 50°C for 12 h. , to obtain medium and high cross-linked resins, called HCMPs (Cl%: 4.5 wt.%, specific surface area 700cm 2 / g), standby.

[0033]S2. Swell 10 g of HCMPs in 120 mL of DCE overnight at room temperature, add 8 g of imidazole and 10 g of 5% sodium hydroxide solution into the reactor, react at 80 °C for 12 h under nitrogen protection, and fi...

Embodiment 2

[0038] S1. 20 g CMPs were swelled overnight at room temperature in 120 mL dichloromethane, and 2.0 g anhydrous AlCl was added 3 as a catalyst. The reaction was carried out at 70°C for 40 min. After the polymer was filtered, it was washed sequentially with hot water, absolute ethanol, 1% dilute hydrochloric acid, and absolute ethanol, dried at low temperature, extracted with ethanol Soxhlet for 12 h, and vacuum-dried at 50°C for 12 h. , to obtain medium and high cross-linked resins, called HCMPs, for later use.

[0039] S2. Swell 10 g HCMPs in 120 mL of dichloromethane overnight at room temperature, add 5 g of imidazole and 10 g of 5% potassium hydroxide solution to the reactor, and react at 70 °C for 12 h under nitrogen protection, Filter, wash with hot water, absolute ethanol, 1% dilute hydrochloric acid, and absolute ethanol sequentially, dry at low temperature, extract with ethanol Soxhlet for 12 h, and dry in vacuum at 50°C for 12 h to obtain 10.4 g of imidazole-modified ...

Embodiment 3

[0041] S1. 20 g CMPs were swollen overnight at room temperature in 120 mL carbon tetrachloride, and 6.0 g anhydrous ZnCl was added 2 as a catalyst. The reaction was carried out at 90°C for 30 min. After the polymer was filtered, it was washed sequentially with hot water, absolute ethanol, 1% dilute hydrochloric acid, and absolute ethanol, dried at low temperature, extracted with ethanol Soxhlet for 12 h, and vacuum-dried at 50°C for 12 h. , to obtain medium and high cross-linked resins, called HCMPs, for later use.

[0042] S2. Swell 10 g HCMPs in 120 mL of DCE overnight at room temperature, add 9 g of imidazole and 10 g of 5% potassium carbonate solution into the reactor, react at 80 °C for 12 h under nitrogen protection, filter, and use Wash with hot water, absolute ethanol, 1% dilute hydrochloric acid, and absolute ethanol in sequence, dry at low temperature, extract with ethanol Soxhlet for 12 h, and dry in vacuum at 50°C for 12 h to obtain 10.5 g imidazole-modified highl...

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Abstract

The invention provides imidazole modified high-crosslinked resin and a preparation method and application thereof, and belongs to the technical field of macroporous resin. The preparation method comprises the steps of: after macroporous chloromethylated polystyrene is swelled, adding a catalyst to enable chloromethyl of a macroporous chloromethylated polystyrene skeleton to be subjected to a partial self-crosslinking reaction to obtain medium- / high-crosslinked resin; and further swelling the medium- / high-crosslinked resin, adding imidazole and alkali liquor for reaction, and enabling the residual part of chloromethyl of the medium- / high-crosslinked resin skeleton to be subjected to a nucleophilic substitution reaction with the imidazole to obtain imidazole modified high-crosslinked resin. The invention develops a novel adsorption resin material which is mainly used for treating organic wastewater, especially salicylic acid-containing wastewater. The salicylic acid adsorption rate of the novel adsorption resin material reaches 97.4%, the adsorption capacity reaches up to 263.2 mg / g, wastewater can be effectively treated, and the treatment cost is saved.

Description

technical field [0001] The invention relates to the technical field of macroporous resins, in particular to an imidazole-modified highly cross-linked resin and its preparation method and application. Background technique [0002] Salicylic acid (SA) is an important organic chemical, which is widely used in medicine, biology, food, pesticide and other industries. However, SA is often accompanied by a large amount of wastewater generation in industrial production processes and applications. Wastewater containing SA has the characteristics of high toxicity, strong acidity, refractory degradation, and great harm to the environment. Commonly used methods for removing SA in water include adsorbent adsorption, electrochemical oxidation, catalytic oxidation, photocatalysis, and biodegradation. Adsorption by porous materials is a simple and efficient wastewater treatment technique, so a large number of new porous materials have been developed. Compared with traditional porous mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F12/08C08F8/32C08F8/24C08J9/36C08L25/06C02F1/28B01J20/26B01J20/30C02F101/34
CPCC08F8/32C08J9/36C02F1/285B01J20/265C02F2101/34C08J2325/06C08F8/24C08F12/08
Inventor 李滔陈桂向柏霖郭香岑罗凯婷刘竞成王泽坤
Owner HUAIHUA UNIV
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