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Alkaline ionic liquid as well as preparation and application thereof

A basic ion, liquid technology, applied in the preparation of amino compounds, the preparation of organic compounds, the preparation of amino hydroxyl compounds, etc., can solve the problems of complex regeneration operation and so on

Inactive Publication Date: 2011-07-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention overcomes the disadvantages of volatilization of other solvents and complicated regeneration operation

Method used

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  • Alkaline ionic liquid as well as preparation and application thereof
  • Alkaline ionic liquid as well as preparation and application thereof
  • Alkaline ionic liquid as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 20.00 g of 2-methylimidazole and add absolute ethanol to dissolve the solid completely, then add 152.29 ml of 1.60 mol / L choline hydroxide, and the molar ratio of anion and cation precursors used is 1:1. Mix well, stir at room temperature, and react for 4 hours. After the reaction is complete, the solvent is distilled off under reduced pressure at 70° C. to obtain the target basic ionic liquid. The synthesized alkaline ionic liquid is relatively easy to absorb water, and after being sealed, it is stored in a desiccator for future use.

[0024] The equation for the reaction is as follows:

[0025]

[0026] ionic liquids were 1 H NMR, 13 C NMR nuclear magnetic characterization: 1 H NMR (400MHz, DMSO, 25°C, TMS): d=2.10(s, 3H, C-CH 3 ), 3.08(s, 9H; N-CH 3 ), 3.32-3.34 (t, 2H; N-CH 2 ), 3.81-3.82 (d, 2H; CH 2 -O), 5.0 (s, 1H; C-OH), 6.49 (s, 2H, N-CH=CH-N); 13 C NMR (600MHz, DMSO, 25°C, TMS) 17.09, 53.50, 55.02, 67.88, 124.27, 148.93ppm

[0027] Ionic liqu...

Embodiment 2

[0029] Weigh 9.54 g of phenol and add absolute ethanol to completely dissolve the solid, then add 59.08 mL of 1.72 mol / L choline hydroxide. The molar ratio of the anion and cation precursors used is 1:1, fully mixed, stirred at room temperature, and reacted for 3 hours. After the reaction is complete, the solvent is distilled off under reduced pressure at 70° C. to obtain the target basic ionic liquid. The synthesized alkaline ionic liquid is relatively easy to absorb water, and after being sealed, it is stored in a desiccator for future use. The equation for the reaction is as follows:

[0030]

[0031] ionic liquids were 1 H NMR, 13 C NMR characterization: H NMR (400MHz, DMSO, 25°C, TMS): d=3.06-3.08 (d, 9H; CH 3 ), 3.32(s, 2H; CH 2 -O), 3.78(s, 2H; N-CH 2 ), 6.05-6.06 (d, 1H; C 6 -H(3)), 6.23(d, 2H; C 6 -H(1,5)), 6.78-6.80(d, 2H; C 6 -H(2,4)) 13 C NMR (600MHz, DMSO, 25°C, TMS) 53.61, 55.67, 68.03, 110.02, 118.97, 129.28, 170.08ppm

[0032] The ionic liquid was ...

Embodiment 3

[0034]Weigh 8.99 g of phenol into a 250 mL flask, add a certain amount of absolute ethanol to completely dissolve the solid, and then add 11.01 g of 1,1,3,3-tetramethylguanidine to which a certain amount of absolute ethanol has been added. The molar ratio of anion and cation precursors used is 1:1, mixed thoroughly, and reacted for 12 hours. After the reaction is complete, the solvent is distilled off under reduced pressure at 70° C. to obtain the target basic ionic liquid. The synthesized alkaline ionic liquid is relatively easy to absorb water, and after being sealed, it is stored in a desiccator for future use.

[0035] The equation for the reaction is as follows:

[0036]

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Abstract

The invention relates to multiple kinds of alkaline ionic liquids as well as preparation methods and application thereof. The alkaline ionic liquid provided by the invention mainly comprises a cation X<+> and an anion Y<->, wherein the precursor of the cation X<+> is choline, phosphine, guanidine or amine; and the precursor of the anion Y<-> is imidazole, phenol or alcohol. The alkaline ionic liquid is prepared from the precursors of the cation and anion at room temperature in a certain ratio. The ionic liquid synthesized in the invention can be applied to the absorption of acidic gases such as carbon dioxide and sulfur dioxide, the absorption and desorption effects are good and the ionic liquid can be recycled.

Description

technical field [0001] The present invention relates to several types of alkaline ionic liquids, their preparation methods, and the application of these types of alkaline ionic liquids in the absorption of acid gases such as carbon dioxide and sulfur dioxide. Background technique [0002] Carbon dioxide is the main component of greenhouse gases, and acid gases such as sulfur dioxide are the main components of acid rain. Due to the destruction of surface vegetation and the increase in the emission of acid gases such as carbon dioxide and sulfur dioxide, the composition of the atmosphere has been destroyed, causing environmental degradation and posing a serious threat to human survival. The absorption treatment of these gases has attracted the attention of many researchers. [0003] Ionic liquids are liquids composed entirely of ions, and what we usually call ionic liquids are ionic compounds that are liquid at room temperature or near room temperature, also known as room tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/40C07C213/08C07D233/56C07C39/04C07C37/00C07C211/13C07C209/00B01D53/14
CPCY02C10/06Y02C20/40Y02P20/151Y02P20/50
Inventor 张锁江徐慧张建敏王赞霞商莹吕兴梅
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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