Interfacial ionic liquid supported catalyst for synthesizing cyclic carbonate from carbon dioxide

A supported catalyst, cyclic carbonate technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of harsh recovery conditions and expensive catalysts, etc. Achieve the effect of low cost of raw materials, large industrial application value and good reproducibility

Inactive Publication Date: 2021-07-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of expensive catalysts and relatively harsh recovery conditions in the synthesis of cyclic carbonates from carbon dioxide, and propose a novel interfacial ionic liquid-supported catalyst, and use it to catalyze CO 2 Application of Synthetic Cyclic Carbonate

Method used

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  • Interfacial ionic liquid supported catalyst for synthesizing cyclic carbonate from carbon dioxide
  • Interfacial ionic liquid supported catalyst for synthesizing cyclic carbonate from carbon dioxide
  • Interfacial ionic liquid supported catalyst for synthesizing cyclic carbonate from carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The interface ionic liquid loading type (ZnBr) prepared in this embodiment 2 / IL@HNTs) catalyst. The preparation method of this type of supported catalyst, concrete steps are:

[0038] Step 1, weigh zinc bromide, 1-butyl-3-methylimidazolium bromide and halloysite with a mass ratio of 1:2:0.8 in a single-mouthed round-bottomed flask for subsequent use;

[0039] Step 2. Place the round bottom flask under a nitrogen atmosphere, heat it to 100°C with an oil bath, and stir it mechanically for 12 hours;

[0040] Step 3, after the reaction is over, centrifuge and wash the product 3 times with absolute ethanol;

[0041] Step 4. Put the sample in a vacuum drying oven at 60°C overnight. After drying, grind the sample and store it sealed for future use.

Embodiment 2

[0043] Structural characterization of ZnBr2 / IL@HNTs catalyst, XRD, TG, Fourier transform infrared and N 2 Adsorption and desorption are as figure 1 , figure 2 , image 3 and Figure 4 shown.

Embodiment 3

[0045] An application for synthesizing a cyclic carbonate by using an interfacial ionic liquid supported catalyst, the specific steps are:

[0046] Step 1, clean up the autoclave, get the ZnBr prepared in example 1 2 / IL@HNTs catalyst 0.1g was put into a 100mL autoclave, and then 8.217g of propylene oxide was added to it, and the catalyst accounted for 1.21wt.% of propylene oxide;

[0047] Step 2. While keeping the reactor airtight, slowly introduce 3.0MPa CO into it 2 Gas, react at 120°C for 2h;

[0048] Step 3. After the reaction is completed, extract and separate with dichloromethane, take a small amount of product and conduct qualitative and quantitative analysis by gas chromatography. The formation rate of the product propylene carbonate is measured to be 98.98%, and the selectivity is >99%.

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Abstract

The invention discloses an interfacial ionic liquid supported catalyst for synthesizing cyclic carbonate from carbon dioxide. The catalyst is characterized in that the carrier is a mineral material and has the characteristics of low price, large specific surface area, porous structure and the like, and the ionic liquid is loaded on the carrier, so that the catalytic performance of the ionic liquid is improved, the dosage of the ionic liquid is greatly reduced, the cost is saved, and the catalyst can be used as a heterogeneous catalyst and is beneficial to recovery and recycling of the catalyst. The catalyst is prepared by mechanically stirring and synthesizing an ionic liquid, zinc halide and a mineral material in a nitrogen atmosphere, compounding various reactants according to a certain feeding ratio, and stirring and reacting at the temperature of 80-140 DEG C for 10-14 hours. The catalyst is low in price and easy to prepare, has excellent catalytic activity and selectivity for catalyzing epoxide and carbon dioxide to generate cyclic carbonate, and is a novel catalyst capable of being produced on a large scale.

Description

technical field [0001] The invention belongs to the field of green chemical catalysis technology and material application, in particular to a preparation method of a novel interfacial ionic liquid-supported catalyst, and the use of the supported ionic liquid to catalyze CO 2 Synthesis of cyclic carbonate applications. Background technique [0002] CO 2 It is currently the most important greenhouse gas on the earth and the main substance that causes global warming. However CO 2 It is a cheap, abundant, clean, non-toxic, and recyclable C1 resource, which can be directly used for the cycloaddition reaction with epoxy compounds, which can not only alleviate the atmospheric CO 2 concentration and "carbon source crisis", and can obtain high value-added propylene carbonate. The by-products in the reaction are negligible, and this is an atom-economical reaction that meets the standards of green chemistry. [0003] In recent years, ionic liquids (CN102336735A, CN110885314A, CN11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C07D317/36
CPCB01J31/0295B01J31/0281C07D317/36Y02P20/584
Inventor 苗世顶彭江涛李静瑶张砚王健魏存弟
Owner JILIN UNIV
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