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Chloride 1,3-di(2-hydroxy ethyl) imidazole ionic liquid and method for synthesizing same

A technology of imidazolium ionic liquid and hydroxyethyl, applied in the field of chloride 1

Inactive Publication Date: 2008-08-27
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For 1,3-two (2-hydroxyethyl) imidazolium cationic ionic liquids have no report at present

Method used

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  • Chloride 1,3-di(2-hydroxy ethyl) imidazole ionic liquid and method for synthesizing same
  • Chloride 1,3-di(2-hydroxy ethyl) imidazole ionic liquid and method for synthesizing same
  • Chloride 1,3-di(2-hydroxy ethyl) imidazole ionic liquid and method for synthesizing same

Examples

Experimental program
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Embodiment 1

[0036] 1,3-bis(2-hydroxyethyl)imidazolium chloride ionic liquid——[hhim] + Cl - The synthesis: in equipped with magnetic stirring, reflux condenser, N 2 Add 100ml of absolute ethanol and 4.7g of metallic sodium to the 250ml three-necked flask of the catheter, and put the three-necked flask into an ice-water bath at -1 to 2°C to react for about 7 hours. After the reaction is complete, add 0.2mol of Imidazole, then slowly add 0.42mol of 2-chloroethanol (re-distilled under reduced pressure) with a dropping funnel, stir for 7h, take out the three-necked flask from the ice-water bath, react at 20°C for 40h, and filter to obtain Light yellow liquid, ethanol and unreacted 2-chloroethanol were evaporated under reduced pressure, washed several times with ethyl acetate, and the obtained light yellow sticky substance was obtained as a crude product for use.

[0037] 1,3-bis(2-hydroxyethyl)imidazolium chloride ionic liquid——[hhim] + Cl - Purification: take 2g[hhIm] + Cl - Dissolve in...

Embodiment 2

[0039] 1,3-bis(2-hydroxyethyl)imidazolium chloride ionic liquid——[hhim] + Cl - The synthesis: in equipped with magnetic stirring, reflux condenser, N 2 Add 100ml of absolute ethanol and 4.7g of sodium metal to the 250ml three-necked flask of the catheter, put the three-necked flask in an ice-water bath at -1 to 2°C, and react for about 8 hours. After the reaction is complete, add 0.2mol 0.41mol of 2-chloroethanol (re-distilled under reduced pressure when used) was slowly added dropwise with a dropping funnel, reacted for 7h, took out the three-necked flask from the ice-water bath, reacted at 30°C for 48h, and filtered to obtain The light yellow liquid was distilled off under reduced pressure to remove the methanol solvent and unreacted 2-chloroethanol, and washed several times with ethyl acetate to obtain a light yellow viscous product as a crude product for use.

[0040] 1,3-bis(2-hydroxyethyl)imidazolium chloride ionic liquid——[hhim] + Cl- Purification: take 2g[hhIm] + C...

Embodiment 3

[0042] 1,3-bis(2-hydroxyethyl)imidazolium chloride ionic liquid——[hhim] + Cl - The synthesis: in equipped with magnetic stirring, reflux condenser, N 2 Add 100ml of absolute ethanol and 4.7g of metallic sodium to the 250ml three-necked flask of the catheter, put the three-necked flask into an ice-water bath at -1 to 2°C, and react for about 7.5 hours. After the reaction is complete, add 0.2mol 0.42mol of 2-chloroethanol (re-distilled under reduced pressure when used) was slowly added dropwise with a dropping funnel, refluxed for 7h, and the three-necked flask was taken out from the ice-water bath, reacted at 50°C for 48h, and filtered to obtain The light yellow liquid was evaporated under reduced pressure to remove the methanol solvent and unreacted 2-chloroethanol, washed several times with ethyl acetate to obtain a light yellow sticky substance, and the crude product was obtained for use.

[0043] 1,3-bis(2-hydroxyethyl)imidazolium chloride ionic liquid——[hhim] + Cl - Pu...

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Abstract

The invention provides a synthesis method of chloride 1, 3-bis (2-hydroxy ethyl) imidazole ionic liquid containing symmetry functional group, which compises mixing imidazole and 2-chloroethanol at the mol ratio of 1:2.1-1:2.2, adding anhydrous ethanol of 2-2.5 powered mol of the imidazole and metal sodium of 0.05-0.07 powered mol of the imidazole as catalyst, mixing and reacting for 7-8h at -1DEG C to 2DEG C, increasing temperature to 10-60DEG C, reacting for 40-48h, filtering to obtain light yellow liquid, depressurizing and evaporating out ethanol and unreacted 2-chloroethanol, washing via ethyl acetate, decolorizing via active carbon, filtering and passing through silicon gel column, standing at 0DEG C to -2DEG C, freezing for 40-48h and crystallizing to obtain pure 1, 3-bis (2-hydroxy ethyl) imidazole ionic liquid. Tests prove that the synthesized 1, 3-bis (2-hydroxy ethyl) imidazole ionic liquid has wide electrochemical window and active functional group, and the invention has wide application in the technical fields of conductive material and polyelectrolyte material.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and relates to an ionic liquid containing symmetrical functional groups and a synthesis method thereof, in particular to a chlorinated 1,3-bis(2-hydroxyethyl)imidazole ionic liquid and a synthesis method thereof. Background technique [0002] Due to its "zero" vapor pressure, high thermal stability and chemical stability, ionic liquids are expected to replace highly volatile, toxic and flammable traditional organic solvents or highly corrosive and polluting inorganic acids. ” and have broad application prospects in the field of cleaning technology and process. [0003] Functional ionic liquids (TSILs) have special functional groups, so that ionic liquids can participate in chemical reactions, and a new class of functional materials and media can be obtained. They have shown good performance in the fields of energy, information, life science, and national defense. Application prospects. Therefo...

Claims

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Application Information

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IPC IPC(8): C07D233/60
Inventor 王荣民胡登卫熊玉兵吴称意王云普
Owner NORTHWEST NORMAL UNIVERSITY
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