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Crown ether type ionic liquid based on imidazole, benzimidazole and their derivatives

A benzimidazole and ionic liquid technology, applied in the field of ionic liquid preparation, can solve problems such as differences in extraction effects, and achieve the effects of fast reaction rate, high conversion rate, and high reaction selectivity

Inactive Publication Date: 2019-05-31
晟合众新型材料科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selective extraction ability of imidazole ionic liquids for polar compounds may be related to the π-π interaction, hydrogen bond interaction and electrostatic interaction between them and the target extract, but the extraction effects of imidazole ionic liquids with different structures on polar compounds are different. big difference

Method used

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  • Crown ether type ionic liquid based on imidazole, benzimidazole and their derivatives
  • Crown ether type ionic liquid based on imidazole, benzimidazole and their derivatives
  • Crown ether type ionic liquid based on imidazole, benzimidazole and their derivatives

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preparation example Construction

[0042]Further, the present invention also provides a method for preparing a crown ether-type ionic liquid based on imidazole, benzimidazole and derivatives thereof, which is characterized in that it comprises the following steps:

[0043] S1, the substitution reaction product of imidazole, benzimidazole and derivatives thereof and the acetonitrile that dichloroglycol is added are mixed, wherein the substitution reaction product of imidazole, benzimidazole and derivatives thereof is mixed with dichloroglycol and acetonitrile The molecular molar ratio is 1:0.9~1.1:18~22;

[0044] S2, heating the product obtained in step S1 to 55-65° C. under nitrogen protection, and reacting for 4-8 hours;

[0045] S3, concentrated, washed with ethyl acetate, and then removed the ethyl acetate layer;

[0046] S4. Separating and purifying the product in step S3 through a column to obtain an ionic liquid.

[0047] Further, the present invention also provides a method for preparing a crown ether-...

Embodiment

[0072] The preparation of dichloroglycol specifically comprises the following steps:

[0073] S1. Dissolve 1mol of diol and 3mol of pyridine into 500mL of dioxane, and heat to 80°C;

[0074] S2. Add 2.2 mol of thionyl chloride dropwise to the product in step S1, drop it slowly, and complete the dropwise addition in 2-3 hours. After the addition, react at a temperature of 80° C. for 5-6 hours;

[0075] S3, naturally cooling the product solution in step S2 to room temperature, distilling dioxane;

[0076] S4, adding the residue in step S3 to ethyl acetate, stirring for 30min, and filtering out the pyridinium salt;

[0077] S5. Wash the filtrate in step S4 with water, dry the ethyl acetate layer with anhydrous sodium sulfate, and concentrate to obtain a light yellow liquid.

[0078] Yield and spectrum analysis

[0079]

[0080] The preparation of the substitution reaction product of imidazole, benzimidazole and derivatives thereof specifically comprises the following steps:...

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Abstract

The invention discloses a crown ether type ionic liquid based on imidazole, benzimidazole and their derivatives. Cations of the crown ether type ionic liquid are imidazole, benzimidazole and their derivatives; anions include neutral or alkaline mononuclear and multinuclear anions; the mononuclear anions include Cl-, Br-, BF4-, PF6-, CF3COO-, CF3SO2-, (CF3SO2)N- and OH-; the multinuclear anions include AlCl4-, FeCl3- CuCl3- and AuCl4-. In some reactions, the crown ether type ionic liquid has the advantages of high reaction rate, high conversion rate, high reaction selectivity, reusability of acatalytic system and the like. In addition, the crown ether type ionic liquid also has a potential application prospect in terms of solvent extraction, separation and purification of matters, recycling of waste macromolecular compounds, fuel cells and solar cells, extraction of industrial waste gas, dissolution of geological samples, separation and treatment of nuclear fuels and nuclear wastes andthe like.

Description

technical field [0001] The invention relates to the technical field of ionic liquid preparation, in particular to a crown ether type ionic liquid based on imidazole, benzimidazole and derivatives thereof. Background technique [0002] Crown ethers are a class of macrocyclic polyether compounds with a ring cavity structure, and the heteroatoms on the ring have strong electronegativity, which makes them have good selectivity for polar compounds. Studies have shown that crown ether compounds have high selectivity and extraction efficiency for polar compounds such as organophosphorus pesticides and aromatic amines. [0003] Ionic liquids have many properties different from traditional solvents, such as low vapor pressure, no flammability, high viscosity, good solubility, good thermal stability, polarity, high conductivity, large heat capacity, adjustable structure, and electrochemical window. wide, recyclable, etc. The liquid-liquid microextraction and liquid phase microextrac...

Claims

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Application Information

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IPC IPC(8): C07D498/08C07D498/18C07C43/12C07C41/22C07C43/11C07C41/09
CPCY02P20/54
Inventor 杨少龙王辉王子月
Owner 晟合众新型材料科技(上海)有限公司
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