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Solid catalyst for synthesizing cyclic carbonate and preparation method thereof

A technology of solid catalyst and cyclic carbonate, which is applied in the direction of catalyst carrier, chemical instrument and method, organic compound/hydride/coordination complex catalyst, etc., can solve the problems of high cost and difficulty in catalyst recovery, and achieve low cost , Improving immobilization efficiency, reducing the effect of reaction temperature

Active Publication Date: 2014-01-22
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved in the present invention is aimed at current ionic liquid catalyst in EO or PO and CO 2 Defects such as difficulty in catalyst recovery and high cost in the process of reaction synthesis of EC or PC

Method used

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  • Solid catalyst for synthesizing cyclic carbonate and preparation method thereof
  • Solid catalyst for synthesizing cyclic carbonate and preparation method thereof
  • Solid catalyst for synthesizing cyclic carbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add toluene, mesoporous foamed silica and bromoacetic acid in sequence in a closed glass container, wherein the mass ratio of mesoporous foamed silica to toluene is 1:10; the mass ratio of mesoporous foamed silica to bromoacetic acid is 2:1 ; Under the microwave power of 200W for 10 minutes, the surface hydroxyl etherified mesoporous silicon oxide foam can be obtained.

[0030] After filtering, washing and drying, add the solid obtained in the above process into a round bottom flask, then add toluene and 1-aminomethyl-3-ethylimidazolium chloride in sequence, wherein the mass ratio of toluene to solid is 10:1 , the mass ratio of solid to 1-aminomethyl-3-ethylimidazolium chloride salt is 2:1, heated to 50°C with magnetic stirring for 6 hours, and the solid catalyst can be obtained, which is designated as Cat1.

Embodiment 2

[0032] Add toluene, mesoporous foamed silica and bromoacetic acid in sequence in a closed glass container, wherein the mass ratio of mesoporous foamed silica to toluene is 1:20; the mass ratio of mesoporous foamed silica to bromoacetic acid is 5:1 ; Under the microwave power of 200W for 3 minutes, the surface hydroxyl etherified mesoporous silicon oxide foam can be obtained.

[0033] After filtering, washing and drying, add the solid obtained in the above process into a round bottom flask, then add toluene and 1-aminomethyl-3-butylimidazolium bromide successively, wherein the mass ratio of toluene to solid is 20:1 , the mass ratio of solid to 1-aminomethyl-3-butylimidazolium bromide is 4:1, and heated to 50°C with magnetic stirring for 3 hours to obtain a solid catalyst, which is designated as Cat2.

Embodiment 3

[0035] Add toluene, mesoporous foamed silica and iodoacetic acid in sequence in a closed glass container, wherein the mass ratio of mesoporous foamed silica to toluene is 1:10; the mass ratio of mesoporous foamed silica to iodoacetic acid is 6:1 ; Under the microwave power of 200W for 3 minutes, the surface hydroxyl etherified mesoporous silicon oxide foam can be obtained.

[0036]After filtering, washing and drying, add the solid obtained in the above process into a round bottom flask, then add toluene and 1-aminopropyl-3-propylimidazolium bromide successively, wherein the mass ratio of toluene to solid is 10:1 , the mass ratio of solid to 1-aminopropyl-3-propylimidazolium bromide is 2:1, heated to 50°C with magnetic stirring for 2 hours, and the solid catalyst can be obtained, which is designated as Cat3.

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Abstract

The invention relates to a solid catalyst for synthesizing cyclic carbonate and a preparation method thereof. In the catalyst, mesoporous foam silicon oxide is used as a carrier, bromoacetic acid or iodoacetic acid and an amino-containing imidazole ionic liquid are used as raw materials, and effective fixation of the ionic liquid on the mesoporous foam silicon oxide material can be realized through a two-step reaction so as to obtain the solid catalyst for synthesizing cyclic carbonate. The method is simple to operate, the obtained solid catalyst can be continuously reused through simple treatment after the reaction, thus the service life is long, the pollution is avoided, and the production cost is greatly reduced. By applying the solid catalyst to a process of synthesizing ethylene carbonate or propylene carbonate through a reaction between ethylene oxide or propylene oxide and carbon dioxide, a good catalysis effect is realized, the selectivity of the cyclic carbonate is higher than 95%, and the yield is higher than 85%.

Description

technical field [0001] The invention relates to the field of preparation of solid catalysts, in particular to a solid catalyst used in the process of synthesizing cyclic carbonates and a preparation method thereof. Background technique [0002] Cyclic carbonates, such as ethylene carbonate (EC) and propylene carbonate (PC), are a class of high-boiling, highly polar organic solvents with excellent properties. They are used in organic synthesis, cosmetics, gas separation, battery dielectrics and metals. Extraction and other fields have a wide range of applications. In recent years, many urea manufacturers have used it as a decarburizing agent, which has greatly increased the demand. The synthesis methods of EC and PC mainly include phosgene method, transesterification method, chloropropanol method and propylene oxide (PO) or propylene oxide (EO) and CO 2 Cycloaddition etc. Among them, EO or PO and CO 2 The production of EC or PC for cycloaddition of raw materials is a low-...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J32/00C07D317/38C07D317/36
Inventor 李永昕苏进薛冰许杰
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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