Amino-functionalized pyrazole ion liquid and method for catalytic synthesis of cyclic carbonate by utilizing same

Abstract

The invention relates to a method for catalytic synthesis of cyclic carbonate by utilizing amino-functionalized pyrazole ion liquid. The method comprises the following steps: adding the amino-functionalized pyrazole ion liquid and an epoxy compound into a reaction kettle according to a molar ratio of 1:(70 to 500), introducing CO2 till pressure in the reaction kettle is 0.5-3.0MPa, then carrying out constant-temperature and constant-pressure reaction for 0.5-5 hours under the condition that the temperature is 80-130 DEG C, and after the reaction is ended, treating to obtain the cyclic carbonate. The amino-functionalized pyrazole ion liquid has the following structural formula shown in the description, wherein n is equal to 1 or 2, and R is CH3 or C2H5. The method has the advantages of simple synthetic process, high catalyst activity, mild catalytic condition, green and environment-friendly effects, no use of other solvents and cocatalysts, no metal contained in the catalyst, and the like.

Description

technical field

[0001] The invention belongs to the technical field of organic synthesis, and in particular relates to an amino functionalized pyrazole ionic liquid and a method for catalytically synthesizing a cyclic carbonate. Background technique

[0002] CO 2 It is the main gas of greenhouse effect, and its main source is the burning of fossil fuels. With the development and progress of the economy, the excessive use of fossil fuels has caused the adverse effects of the greenhouse effect to expand day by day. How to effectively control CO in the atmosphere 2 To reduce its impact on the greenhouse effect and improve the earth's environment has become one of the major environmental issues that humans need to solve in the new century. In this situation, the effective capture and fixation of CO 2 Become a current CO 2 Take advantage of research hotspots.

[0003] CO 2 It is an abundant, clean, non-toxic, and recyclable carbon resource, and can be used as a C1 buildi...

Examples

Embodiment Construction

[0019] The technical solutions of the present invention will be further described in detail below in conjunction with the examples, but the protection scope of the present invention is not limited thereto.

[0020] The following tests one to four give the amino functionalized pyrazole ionic liquid 1-(2-aminoethyl)-2-methylpyrazole bromide salt, 1-(3-aminopropyl)-2-methylpyrazole Preparation process of azole bromide salt, 1-(2-aminoethyl)-2-ethylpyrazole bromide salt, 1-(3-aminopropyl)-2-ethylpyrazole bromide salt.

technical field

[0001] The invention belongs to the technical field of organic synthesis, and in particular relates to an amino functionalized pyrazole ionic liquid and a method for catalytically synthesizing a cyclic carbonate. Background technique

[0002] CO 2 It is the main gas of greenhouse effect, and its main source is the burning of fossil fuels. With the development and progress of the economy, the excessive use of fossil fuels has caused the adverse effects of the greenhouse effect to expand day by day. How to effectively control CO in the atmosphere 2 To reduce its impact on the greenhouse effect and improve the earth's environment has become one of the major environmental issues that humans need to solve in the new century. In this situation, the effective capture and fixation of CO 2 Become a current CO 2 Take advantage of research hotspots.

[0003] CO 2 It is an abundant, clean, non-toxic, and recyclable carbon resource, and can be used as a C1 buildi...

Examples

Embodiment Construction

[0019] The technical solutions of the present invention will be further described in detail below in conjunction with the examples, but the protection scope of the present invention is not limited thereto.

[0020] The following tests one to four give the amino functionalized pyrazole ionic liquid 1-(2-aminoethyl)-2-methylpyrazole bromide salt, 1-(3-aminopropyl)-2-methylpyrazole Preparation process of azole bromide salt, 1-(2-aminoethyl)-2-ethylpyrazole bromide salt, 1-(3-aminopropyl)-2-ethylpyrazole bromide salt.

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