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A kind of method for synthesizing ionic liquid of two aqueous phases

An ionic liquid, two-phase technology, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carboxylic acid compounds, etc., to achieve the effect of reducing synthesis cost, simple equipment and convenient operation

Active Publication Date: 2022-01-07
ZHUHAI INST OF ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such synthetic methods have obvious limitations

Method used

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  • A kind of method for synthesizing ionic liquid of two aqueous phases
  • A kind of method for synthesizing ionic liquid of two aqueous phases

Examples

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Embodiment 1

[0041] Embodiment 1: 1-butyl-3-methylimidazolium acetate ionic liquid [BMIm] + [CH 3 CO 2 ] - preparation of

[0042] A method for synthesizing ionic liquid in two aqueous phases, comprising the following steps:

[0043] At 25 °C, 0.10 mol of cation precursor [BMIm] + [Cl] - and 0.12mol anion precursor [Na] + [CH 3 CO 2 ] - Dissolve in 10mL water and mix, then add 0.123mol (i.e. 18g) of layering reagent lysine (lysine is added in batches, 1g each time, after the amount of lysine added reaches 6g, stratification occurs, and the amount added reaches 18g, the volume of the ionic liquid enriched layer no longer changes), stirred and reacted for 30 minutes, left standstill after the end of the reaction, and liquid / liquid stratification occurred (the upper layer was [BMIm] + [CH 3 CO 2 ] - Ionic liquid, the lower layer is layered reagents lysine, water, [Na] + 、[Cl] - mixture), and the by-product [Na] + [Cl] - Precipitate, liquid separation, made into ionic liquid [...

Embodiment 2

[0046] Example 2: 1-butyl-3-methylimidazolium borate oxalate ionic liquid [BMIm] + [BOB] - preparation of

[0047] A method for synthesizing ionic liquid in two aqueous phases, comprising the following steps:

[0048] At 25 °C, 0.10 mol of cation precursor [BMIm] + [Cl] - and 0.12mol anion precursor lithium bisoxalate borate [Li] + [BOB] - Dissolve in 10mL water and mix, then add 0.056mol (i.e. 10g) layering reagent glucose (add glucose in batches, 1g each time, after the amount of glucose added reaches 4g, stratification occurs, the amount added reaches 10g, and the ionic liquid is enriched The volume of the layer no longer changes), stirred and reacted for 30 minutes, left standstill after the end of the reaction, and liquid / liquid stratification occurred (the upper layer is [BMIm] + [BOB] - Ionic liquid, the lower layer is layered reagent glucose, water, [Li] + 、[Cl] - mixture), and the by-product [Li] + [Cl] - Precipitate, liquid separation, made into ionic liqu...

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Abstract

The invention belongs to the field of chemical synthesis, and discloses a method for synthesizing an ionic liquid in a two-phase aqueous phase, comprising the following steps: making a cationic precursor [Cat] + [X] ‑ and anion precursor [M] + [A] ‑ Dissolve in water, then add layering reagent, stir the reaction, let it stand still, get two layers of layered liquid, carry out liquid separation, and make ionic liquid [Cat] + [A] ‑ ; The layering agent is selected from at least one of sugar, sugar alcohol or amino acid. This method involves the use of layered reagents, and realizes a more general new method for the synthesis of ionic liquids. It no longer requires the inorganic salt reactants to have high water solubility, and also avoids the use of organic solvents or silver salts in traditional methods. Hazardous substances, very environmentally friendly, and the layered reagents can be reused; the prepared ionic liquid [Cat] + [A] ‑ The purity is greater than 98%.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for synthesizing an ionic liquid with two aqueous phases. Background technique [0002] Ionic liquid (or ionic liquid) refers to a liquid composed entirely of ions. Organic ionic liquids (Organicionic liquids) are a class of organic molten salts composed of organic cations and inorganic or organic anions, which are liquid at room temperature or near room temperature. The volume of the ions that make up the ionic liquid is large, coupled with the conjugation effect, the charges are fully dispersed on the anions and cations, which weakens the electrostatic force between the anions and cations; the volume difference between anions and cations is very large and extremely small Symmetry reduces the order of the entire system, allowing such ionic compounds to be liquid at room temperature. Based on the environment-friendly characteristics of ionic liquids, uniqu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D233/58C07C53/10C07C51/41C07C51/48C07F5/02
CPCC07D233/58C07C53/10C07C51/412C07C51/48C07F5/022
Inventor 张嘉恒陈正件费玉清陈晓欣王嘉慧余明远刘凌雯田妹殷欣怡
Owner ZHUHAI INST OF ADVANCED TECH
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