Ionic liquid with amino acids and preparation method and application of ionic liquid

A technology of ionic liquids and amino acids, applied in chemical instruments and methods, catalytic reactions, organic chemistry, etc., can solve the problems that conventional ionic liquids cannot meet the needs, achieve high yield, ensure catalytic effect, and reduce costs

Active Publication Date: 2016-12-14
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the deepening of the research and application of ionic liquids, conventional ionic liquids can no longer meet the demand

Method used

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  • Ionic liquid with amino acids and preparation method and application of ionic liquid
  • Ionic liquid with amino acids and preparation method and application of ionic liquid
  • Ionic liquid with amino acids and preparation method and application of ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Preparation of cationic amino acid ionic liquid without amino groups

[0029] (1) Preparation of 1-butyl-3-methylimidazolium aspartate ionic liquid ([bmim][ASP])

[0030] N-methylimidazole and n-butane bromide with a molar ratio of 1:1.2 were mixed and dissolved in 100 mL of toluene solution, and the reaction was refluxed in an oil bath at 70 °C for 8 h. After the reaction, put it into the refrigerator to freeze, and crystallize for 24h. Filtration under reduced pressure and vacuum drying at 80°C for 24h; after obtaining 1-butyl-3-methylimidazolium bromide ionic liquid, the bromine was exchanged for -OH on the resin through 717 type anion exchange resin, and then the exchanged The ionic liquid reacted with aspartic acid in deionized water at a molar ratio of 1:1.1, stirred for 24 h, filtered to remove excess amino acid, the filtrate was concentrated by rotary evaporator under reduced pressure distillation, suction filtered, and vacuum dried at 60 °C After 24...

Embodiment 2

[0041] Example 2 Preparation of cationic amino acid ionic liquid with amino group

[0042](1) 1-Aminopropyl-3-butylimidazolium aspartic acid ionic liquid ([NH 2 pbim][ASP]) preparation

[0043] Under nitrogen protection, 3-bromopropylamine hydrobromide and n-butylimidazole were mixed in a molar ratio of 1:1.1, dissolved in a certain amount of anhydrous ethanol solution, condensed and refluxed at 90 °C for 24 hours, and distilled under reduced pressure to remove After ethanol solvent, vacuum-drying, adding an appropriate amount of KOH aqueous solution to make the pH of the solution 8-9, drying, adding anhydrous ethanol solvent to the solid, stirring to dissolve, filtering, and vacuum-drying the filtrate to obtain 1-aminopropyl-3 After -butylimidazolium bromide ionic liquid, the bromine is exchanged for -OH on the resin through 717 type anion exchange resin, and then the exchanged ionic liquid is reacted with aspartic acid in deionized water at a molar ratio of 1:1.1 , stirred...

Embodiment 3

[0054] Example 3 Catalytic cycloaddition reaction of epoxy compounds by cationic amino acid ionic liquid without amino group

[0055] (1) The effect of temperature on the reaction yield

[0056] In a 50ml autoclave, add catalyst [bmim][ASP] and epichlorohydrin, mix, and feed 0.5MPCO 2 , at the temperature shown in Table 1, the reaction was carried out for 12 hours. The amount of catalyst added is 0.3% of the moles of epichlorohydrin. After the reaction, the yield of cyclic carbonate was calculated, and the results are shown in Table 1.

[0057] Table 1

[0058] temperature °C

[0059] (2) CO 2 Effect of pressure on reaction yield

[0060] The method is the same as (1), the temperature is 130 °C, and the pressure is changed as shown in Table 2. The results are shown in Table 2.

[0061] Table 2

[0062] pressure MP

[0063] (3) Influence of catalyst dosage on reaction yield

[0064] The method is the same as (1), the temperature is 130 °C, the amount...

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Abstract

The invention relates to ionic liquid with amino acids and a preparation method and application of the ionic liquid. In the ionic liquid with the amino acids, negative ions are amino acids, and positive ions are the positive ions without amino or with amino. The functionalized ionic liquid with the amino acids has the advantages that in cyclic carbonate synthesis through catalysis of carbon dioxide and epoxy compounds, the yield and the activity are high, cocatalyst and other solvents are not needed, the reaction conditions are mild, the stability is high, no pollution to the environment is generated, and green and environmental friendliness are achieved.

Description

technical field [0001] The invention relates to the field of ionic liquids and chemical catalysis, in particular to an ionic liquid with amino acids and its use in catalyzing CO 2 and epoxy compounds in the preparation of important chemical carbonates. Background technique [0002] With the rapid development of modern industry, many fields consume a large amount of fossil fuels such as coal, oil and natural gas, but the pollutants and CO2 emitted by the combustion of these fossil fuels 2 It also has a serious impact on society. On the other hand, CO 2 It is a non-toxic, cheap and abundant carbon resource on earth. with CO 2 As a raw material, it can be catalytically converted into a variety of chemicals, while CO 2 The process of cycloaddition with epoxide to synthesize cyclic carbonate has become the most promising and one of the few industrialized utilization of CO due to the low cost of raw materials, 100% atomic utilization, and the development of "green chemistry" ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/58C07D233/61C07D295/037C07D215/10B01J31/02C07D317/36
CPCB01J31/0282B01J31/0284B01J2231/341C07D215/10C07D233/58C07D233/61C07D295/037C07D317/36
Inventor 岳爽郝秀佳宋骞李俊
Owner LIAONING UNIVERSITY
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