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Double-functional group ionic liquid and preparation method

An ionic liquid and bifunctional technology, which is applied in the synthesis of bifunctional ionic liquids and the field of bifunctional ionic liquids, can solve the problems of difficult control of reaction conditions, expensive raw materials, complicated preparation steps, etc., and achieves easy purification, The effect of being stable in contact with water and air and reducing loss

Inactive Publication Date: 2007-10-24
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a bifunctional grouped ionic liquid and its preparation method to overcome the fact that the existing ionic liquid material only contains one functionalized functional group, which limits the application of further modification or immobilization of the ionic liquid, and Existing methods or raw materials are expensive, complex preparation steps, difficult to control reaction conditions, and low reaction efficiency

Method used

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  • Double-functional group ionic liquid and preparation method
  • Double-functional group ionic liquid and preparation method
  • Double-functional group ionic liquid and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Dimethylethanolyl 3-sulfonate propylammonium inner salt

[0044] Under the condition of ice bath and stirring, slowly add 8.8mL of 1,3-propane sultone (0.1mol) dropwise into 30mL of acetone mixed solution containing 10.1mL of N,N-dimethylethanolamine (0.1mol), namely The molar ratio of the reaction materials was 1:1, and a white solid precipitated out soon. After 1 hour, the white solid was washed with acetone and ether three times, filtered, and dried under vacuum at 50°C. The reaction equation is:

[0045]

Embodiment 2

[0047] [p-Toluenesulfonic acid][Dimethylethanolyl 3-propylammoniumsulfonate] ionic liquid

[0048] Under ice-bath and stirring conditions, 1.95g (0.01mol) of the dimethylethanolyl 3-sulfonate propylammonium inner salt obtained in Example 1 and 1.81g p-toluenesulfonic acid (0.01mol) were mixed, and after 3 hours, Heating to 70°C until it becomes liquid, then vacuum drying after cooling. The product is a colorless transparent liquid, and the reaction equation is:

[0049]

Embodiment 3

[0051] [Trifluoromethanesulfonic acid][Dimethylethanolyl 3-propylammoniumsulfonate] ionic liquid

[0052] N 2 Under the conditions of atmosphere, ice bath and electric stirring, 1.80mL of trifluoromethanesulfonic acid (0.02mol) was slowly added dropwise to 4.23g (0.02mol) of the dimethylethanolyl 3-sulfonate propylammonium obtained in Example 1 In the internal salt, after 12 hours, heat to 50°C until all of it becomes liquid, and then vacuum dry after cooling. The product is light yellow transparent liquid, and the reaction equation is:

[0053]

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Abstract

The invention discloses a bifunctional group ion liquid, which comprises the following steps: hydroxy and its derivant group, quaternary ammonium salt cation of sulfonic group and anion of sulfonic acid group or sulfate radical. The ion liquid is stable to meet water with fitful viscosity and low cost, which creates condition for further modified or fixed ion liquid.

Description

technical field [0001] The invention belongs to the technical field of chemical materials and their preparation, and in particular relates to a bifunctional grouped ionic liquid. The invention also relates to a synthesis method of the bifunctional grouped ionic liquid. Background technique [0002] Room temperature ionic liquid refers to a substance composed of ions in a liquid state at room temperature or near room temperature. It is another kind of green solvent system after water and supercritical carbon dioxide. Most of the ionic liquids reported in the early days are organic salts containing aluminum halides. Their disadvantage is that they are sensitive to moisture and will decompose when they meet water. In the 1990s, ionic liquids that were stable to water and air were successively synthesized. Most of these ionic liquids are composed of alkyl pyridinium cations, alkyl imidazolium cations, alkyl quaternary ammonium cations and alkyl quaternary phosphorus cations an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/02C07C303/02
Inventor 王荣朱国阳刘国华吴霞琴戴立益
Owner SHANGHAI NORMAL UNIVERSITY
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