Polyimidazole ionic liquid based copolymer, and preparation method and application thereof

An ionic liquid, polyimidazole technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as high operating costs, secondary pollution, and complicated operations, and achieve low cost, large adsorption capacity, Good desorption performance

Active Publication Date: 2018-11-30
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most prominent shortcomings of these methods are that the operation is cumbersome when treating low-concentration...

Method used

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  • Polyimidazole ionic liquid based copolymer, and preparation method and application thereof
  • Polyimidazole ionic liquid based copolymer, and preparation method and application thereof
  • Polyimidazole ionic liquid based copolymer, and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0031] Embodiment 1 A kind of polyimidazole ionic liquid-based copolymer

[0032] (1) Polyimidazole-based ionic liquid-based copolymer DVB-p[C 2 Vmir][Cl]

[0033]

[0034] The preparation method is as follows:

[0035] 1) Synthesis of imidazole-based ionic liquids: Take 4.706g N-vinylimidazole and 9.896g 1,2-dichloroethane into a 100mL single-necked flask, then add 40mL acetonitrile and mix well, react at 80°C for 9h to obtain a brown viscous Like liquid, remove acetonitrile with vacuum distillation, wash, purify to obtain intermediate product imidazoles ionic liquid [C 2 Vmir] [Cl].

[0036] 2) 4mL of the obtained [C 2 Add Vmir][Cl] into the three-necked flask, then add 0.02g N,N-methylenebisacrylamide (MBA), 0.3mL divinylbenzene (DVB), 40mL acetonitrile, ultrasonic 20min, then add 0.2g Potassium sulfate, react at 80°C for 24h, after cooling, suction filter, wash, purify, and vacuum dry to obtain polyimidazole ionic liquid-based copolymer DVB-p[C 2 Vmir] [Cl].

[0...

Embodiment 2

[0052] Example 2 Polyimidazole-based ionic liquid-based copolymer as an adsorbent to the recovery of rhenium

[0053] (1) Adsorption effect of polyimidazole-based ionic liquid-based copolymer adsorbents with different carbon chain lengths on Re(VII)

[0054] Method: get the polymer DVB-p[C prepared by 10mg embodiment 1 respectively 2 Vmir][Cl], DVB-p[C 4 Vmir][Cl], DVB-p[C 6 Vmir][Cl], add 5mL of different pH (pH=1,2,3,4,5,6,7) respectively, 20mg·L -1 The solution of Re(VII) was shaken in the shaking box for 8h, and the results were as follows: image 3 shown.

[0055] Depend on image 3 It can be seen that the adsorption capacity of the three adsorbents for Re(VII) is relatively low under high acidity conditions, which may be due to the Cl in the solution at higher acidity - The concentration is high, which is not conducive to the Cl on the adsorption material - with ReO 4 - Anion exchange occurs; at lower acidity, ReO 4 - The electrostatic attraction with the imid...

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Abstract

The invention relates to a polyimidazole ionic liquid based copolymer, and a preparation method and an application thereof, belonging to the field of adsorbent synthesis. The preparation method comprises the following steps: weighing N-vinylimidazole and dichloroalkane, then adding the N-vinylimidazole and the dichloroalkane into a reactor, adding acetonitrile, carrying out uniform mixing, carrying out a reaction at 70 to 80 DEG C for 8 to 12 h, carrying out reduced pressure distillation to remove the acetonitrile, and carrying out washing and purifying so as to obtain an imidazole ionic liquid with a formula of [CxVmir][Cl]; and subjecting the imidazole ionic liquid with the formula of [CxVmir][Cl], N,N-methylene bisacrylamide MBA, divinyl benzene DVB and the acetonitrile to ultrasonic and uniform stirring, adding potassium persulfate, carrying out a reaction at 70 to 80 DEG C for 18 to 24 hours, and carrying out cooling, vacuum filtering, washing, purifying and vacuum drying so as toobtain a target product namely the polyimidazole ionic liquid based copolymer with a formula of DVB-p[CxVmir][Cl]. The preparation method provided by the invention is simple and safe, has high adsorption efficiency to rhenium, is energy-saving and environmentally-friendly, and has large adsorbing capacity and application practicality.

Description

technical field [0001] The invention relates to a preparation method of a polyionic liquid-based copolymer and its application in the fields of environment and chemical industry, in particular to a polyimidazole-based ionic liquid-based copolymer adsorbent selectively adsorbing rhenium and its preparation method and application. Background technique [0002] Scattered metals (abbreviated as RSE) can also be called rare scattered metals, among which rhenium is a kind of precious scattered metals. It is the rarest metal on earth. It has high strength, high melting point, excellent ductility, mechanical stability and formability. It is an important emerging metal material today and is widely used in petroleum industry, aerospace industry, automobile industry, electronics Industry and other modern industrial sectors. [0003] At present, the methods for extracting rhenium mainly include: extraction separation method, ion exchange method, liquid membrane method, redox method, pr...

Claims

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Application Information

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IPC IPC(8): C08F226/06C08F222/38C08F212/36B01J20/26C02F1/28B01J20/30C02F101/20
CPCB01J20/264C02F1/285C02F2101/20C08F226/06C08F222/385C08F212/36
Inventor 娄振宁黄孟楠邢姗姗周鹏单炜军熊英
Owner LIAONING UNIVERSITY
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