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Preparation method and use of tertiary amino functional imidazole ionic liquid

An ionic liquid and functionalized technology, applied in the field of ionic liquid preparation, can solve the problems of cumbersome process, unfriendly environment, time-consuming and energy-consuming, etc., and achieve the effects of simple process, thorough absorption and high product yield.

Active Publication Date: 2010-10-27
河北康壮环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the existing preparation methods of amino-functionalized ionic liquids have the disadvantages of cumbersome process, time-consuming and energy-consuming, and unfriendly to the environment.

Method used

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  • Preparation method and use of tertiary amino functional imidazole ionic liquid
  • Preparation method and use of tertiary amino functional imidazole ionic liquid
  • Preparation method and use of tertiary amino functional imidazole ionic liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A preparation method of a tertiary amine functionalized imidazole ionic liquid, the steps are:

[0043] First weigh 34.5g of 0.2mol 2-chlorotriethylamine hydrochloride and dissolve it in 17ml of water, then add 0.21mol of NaBF 4 Dissolve 21.6g in 24ml of water, mix the two solutions at room temperature, stir to fully dissolve, and then use 50ml of CH 2 Cl 2 Extraction was carried out three times, adding 10g of anhydrous NaSO 4 Dry, clarify the supernatant, vacuum filter, distill off CH 2 Cl 2 , quantitatively obtain the 2-chlorotriethylamine hydrochloride ionic liquid loaded with anions;

[0044] Add the reaction product of the previous step together with 0.21mol N-methylimidazole 17.5g into 30ml of acetonitrile, stir to dissolve, react at 80°C for 8h, and cool to room temperature;

[0045] Add 15g of anhydrous NaSO to the reaction product of the previous step 4 Dry, clarify the supernatant, vacuum filter, distill off acetonitrile, add 10% NaOH aqueous solution, a...

Embodiment 2

[0051] A preparation method of a tertiary amine functionalized imidazole ionic liquid, the steps are:

[0052] First weigh 34.5g of 0.2mol 2-chlorotriethylamine hydrochloride and dissolve it in 16ml of water, then add 0.21mol KPF 6 Dissolve 38.6g in 21ml of water, mix the two aqueous solutions at room temperature, stir to fully dissolve, and then use 50ml of CH 2 Cl 2 Extraction was carried out three times, adding 10g of anhydrous NaSO 4 After drying, the supernatant liquid was clarified, vacuum filtered, and CH was distilled off. 2 Cl 2 , quantitatively obtain the 2-chlorotriethylamine hydrochloride ionic liquid loaded with anions;

[0053] Add the reaction product of the previous step together with 0.21mol N-methylimidazole 17.5g into 30ml of acetonitrile, stir to dissolve, react at 80°C for 5h, and cool to room temperature;

[0054] Add 15g of anhydrous NaSO to the reaction product of the previous step 4 After drying, the supernatant liquid was clarified, vacuum filte...

Embodiment 3

[0060] A preparation method of a tertiary amine functionalized imidazole ionic liquid, the steps are:

[0061] First weigh 34.5g of 0.2mol 2-chlorotriethylamine hydrochloride and dissolve it in 17ml of water, then add 0.21mol of NaBF 4 Dissolve 23.1g in 20ml of water, mix the two aqueous solutions at room temperature, and stir to fully dissolve them, then use 50ml of CH 2 Cl 2 Extraction was carried out three times, adding 10g of anhydrous NaSO 4 After drying, the supernatant liquid was clarified, vacuum filtered, and CH was distilled off. 2 Cl 2 , quantitatively obtain the 2-chlorotriethylamine hydrochloride ionic liquid loaded with anions;

[0062] Add the reaction product of the previous step together with 0.21mol N-butylimidazole 17.2g into 50ml of acetonitrile, stir to dissolve, react at 60°C for 12h, and cool to room temperature;

[0063] Add 15g of anhydrous NaSO to the reaction product of the previous step 4 After drying, the supernatant was clarified, vacuum fil...

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Abstract

The invention discloses a preparation method of tertiary amino functional imidazole ionic liquid. The method comprises the following steps of: A, reacting 2-chlorotriethylamine hydrochloride ionic liquid carrying anions with excessive N-alkyl imidazole in acetonitrile for 5 to 12h at the temperature of 60 to 80 DEG C and cooling the obtained product to room temperature; B, drying the reaction product in step A by using drying agents, obtaining supernatant by settling, performing vacuum filtration, removing the acetonitrile by steaming and neutralizing the solution to a pH of 8 by using alkali; and C, extracting the obtained product by using methylene chloride and then removing the methylene chloride by rotary evaporation to obtain the target product. The preparation method has the advantages of simple process, moderate reaction condition, green environmental protection, low raw material cost and high product yield. The invention also provides the application method of the tertiary amino functional imidazole ionic liquid serving as SO2 gas absorbents.

Description

technical field [0001] The present invention relates to a kind of preparation method of ionic liquid, especially a kind of preparation method of the imidazoles ionic liquid of tertiary amine functionalization; The present invention also relates to the ionic liquid prepared by this method as SO 2 Use of gas absorbents. Background technique [0002] Functionalized ionic liquids refer to the functional modification of ionic liquids by grafting specific functional groups to purposefully synthesize ionic liquids with specific properties. Due to the "task specificity" of functionalized ionic liquids, it has been widely studied and applied in the field of separation analysis, homogeneous catalysis, functional materials and organic wastewater treatment technology. [0003] At present, there have been some reports on amine-functionalized imidazole ionic liquids. Chinese patent CN1001337939A synthesizes a basic ionic liquid with tertiary amine functional groups, and the ionic liquid...

Claims

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Application Information

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IPC IPC(8): C07D233/61B01D53/14
Inventor 刘宝友王园园魏福祥张红燕
Owner 河北康壮环保科技股份有限公司
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