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Method for preparing ionic catalyst and carrying out catalytic conversion on carbon dioxide

A catalyst and ionic technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of low density of loaded catalysts, large demand for carriers, and recycling Poor effect and other problems

Active Publication Date: 2017-02-22
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the loading method is generally used to load this type of catalyst on an organic polymer or an inorganic carrier through covalent or nonvalent bond force, but this method requires a large amount of carrier, the supported catalyst has a low density, is easy to deactivate, and can be recycled. not effectively

Method used

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  • Method for preparing ionic catalyst and carrying out catalytic conversion on carbon dioxide
  • Method for preparing ionic catalyst and carrying out catalytic conversion on carbon dioxide
  • Method for preparing ionic catalyst and carrying out catalytic conversion on carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Example 1: Imidazole functionalized porous coordination polymer 1

[0012] At room temperature, add 2-imidazole terephthalic acid and zirconium tetrachloride into the mixed solution of N,N'-dimethylformamide and acetic acid according to the same amount of substances, and gradually raise the temperature to 120°C, and react After 48 hours, cool down to room temperature, centrifuge to separate the solid, wash with N,N'-dimethylformamide, wash with methanol, and dry in vacuo to obtain imidazole-functionalized porous coordination polymer 1.

Embodiment 2

[0013] Example 2: Imidazolium salt functionalized porous coordination polymer ionic catalyst 2

[0014] At room temperature, disperse the catalyst precursor and 10 times molar equivalent of methyl iodide in anhydrous acetonitrile solvent, react at 80°C for 48 hours, cool down to room temperature, centrifuge to separate the solid, wash and centrifuge with acetonitrile, methanol and ether successively, and dry in vacuo , to obtain ionic catalyst 2.

Embodiment 3

[0015] Embodiment 3: Ionic catalyst 2 catalyzes epichlorohydrin to obtain cyclic carbonate reaction

[0016] Under room temperature, add 0.052mmol ionic catalyst {[(I - )Meim-BDC] x [im-BDC] 1-x [Zr 6 o 4 (OH) 4 ]} n , 10mmol epichlorohydrin, the ratio of the amount of the two substances is 13:2500, closed system, keep CO 2 The reaction temperature was 1 atm, the reaction temperature was 100°C, and after 24 hours of reaction, the cyclic carbonate was diluted with ethyl acetate, dried over anhydrous sodium sulfate, and separated by column chromatography to obtain the corresponding chloromethylene cyclic carbonate with a conversion rate of 88%. Selectivity 94%; Catalyst 2 was washed with ethyl acetate, washed with acetone, dried in vacuum, and recycled.

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Abstract

The invention relates to an imidazolium salt-based porous coordination polymer ionic catalyst, a preparation method thereof, and an application of the catalyst in catalysis of a cycloaddition esterification reaction of carbon dioxide and olefin epoxide under normal pressure. The ionic catalyst comprises an imidazole / imidazolium salt functionalized terephthalic acid anion and a six-zirconium metal oxygen cluster, and is prepared through a solvothermal technology and an after-modification technology. The catalyst is simple to prepare, can highly-actively and highly-selectively catalyze the esterification reaction of chloropropylene oxide and other olefin epoxides, can be simply separated from products, and can be recycled multiple times.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide catalytic conversion, and in particular relates to a preparation method of an imidazolium salt-based functionalized ionic catalyst and an application of catalyzing the esterification reaction of carbon dioxide and olefin epoxide. Background technique [0002] Cyclic carbonates are important raw materials for organic synthesis, and are widely used in gas separation, chemical synthesis, electrolyte metal extraction of high-energy-density batteries, and fine chemicals. At present, the most important method for industrially preparing cyclic carbonates is the cycloaddition reaction of olefin epoxides and carbon dioxide, and the commonly used catalysts are metal oxides, quaternary ammonium salts, alkali metal halides (such as KI), and transition metal complexes, etc. However, they are insoluble in epoxy compounds, and a large amount of organic solvents need to be added during the reaction, and b...

Claims

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Application Information

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IPC IPC(8): B01J31/22C07D317/36
CPCY02P20/584B01J31/1691B01J31/2217B01J2531/0238B01J2531/48C07D317/36
Inventor 梁均曹荣黄远标
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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