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Method for preparing cyclic carbonate by manganese-based catalyst

A cyclic carbonate, manganese-based catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low efficiency and save energy , The effect of short response time and reduced pressure equipment requirements

Inactive Publication Date: 2018-04-24
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a heterogeneous catalyst with simple synthesis steps, cheap and easy-to-obtain raw materials, high catalytic efficiency, stability and easy recovery in view of the low efficiency of the current reaction system under mild conditions. Under the condition of high pressure and no solvent, it can be converted into cyclic carbonate with high efficiency, which can be widely used in the field of industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The manganese-based catalyst of the present embodiment prepares the method for cyclic carbonate, and the steps are as follows:

[0020] Into a 10mL stainless steel autoclave, add 50mg (active component manganese 0.4mol%) of catalyst conjugated manganese porphyrin bipyridine microporous polymer material, 12.5mmol propylene oxide and 0.9mmol cocatalyst tetra-n-butyl For ammonium bromide, feed carbon dioxide and keep the pressure at 0.1MPa. Stir at 25°C for 48 hours, cool at room temperature, and slowly release the remaining carbon dioxide, filter and separate the catalyst, and obtain the separation of cyclic carbonate after purification. The yield was 96%.

Embodiment 2

[0022] The manganese-based catalyst of the present embodiment prepares the method for cyclic carbonate, and the steps are as follows:

[0023] Into a 10mL stainless steel autoclave, add 50mg (active component manganese 0.2mol%) of catalyst conjugated manganese porphyrin bipyridine microporous polymer material, 12.5mmol of butylene oxide and 0.9mmol of cocatalyst tetra-n-butyl Ammonium bromide, feed carbon dioxide and keep the pressure at 0.1MPa, stir at 25°C for 48 hours, cool at room temperature, slowly release the remaining carbon dioxide, filter and separate the catalyst, and obtain the cyclic carbonate after purification The isolated yield was 93%.

Embodiment 3

[0025] The manganese-based catalyst of the present embodiment prepares the method for cyclic carbonate, and the steps are as follows:

[0026] Into a 10mL stainless steel autoclave, add 50mg (active component manganese 0.5mol%) of catalyst conjugated manganese porphyrin bipyridine microporous polymer material, 12.5mmol epichlorohydrin and 0.9mmol cocatalyst tetra-n-butyl Ammonium bromide, feed carbon dioxide and keep the pressure at 0.1MPa, stir at 25°C for 48 hours, cool at room temperature, slowly release the remaining carbon dioxide, filter and separate the catalyst, and obtain the cyclic carbonate after purification The isolated yield was 97%.

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Abstract

The invention discloses a method for preparing cyclic carbonate by a manganese-based catalyst. On the basis of carbon dioxide and epoxides as raw materials, a conjugated manganese porphyrin dipyridine / conjugated manganese porphyrin dipyrrole microporous polymer material as a heterogeneous catalyst and tetra-n-butylammonium bromide as a promoter, efficient and green catalyzed synthesis of cyclic carbonate is realized under the condition of normal temperature and normal pressure in the absent of a solvent. The method has the main advantages that a preparation method of the catalyst is simple, and the catalyst is low in cost, high in catalytic activity, stable in structural performance, easy to recover and recyclable. Reaction conditions are mild, the reaction rate is high, and operation is safe, so that the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a method for preparing cyclic carbonate with a manganese-based catalyst. Background technique [0002] With the development of society and the progress of human civilization, especially the rapid development of industry, the demand for fossil energy consumption is increasing day by day. With the extensive use of fossil fuels, the concentration of carbon dioxide rises rapidly and becomes a major greenhouse gas, causing a series of environmental and ecological problems. At the same time, carbon dioxide is an ideal carbon resource that is widely distributed, abundant in reserves, cheap and easy to obtain, renewable, non-toxic and non-flammable. No matter from the perspective of environmental protection or the utilization of renewable resources, the research on the capture and chemical conversion of carbon dioxide is of great significance. The synthesis of org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/36C07D317/64B01J31/22
CPCC07D317/36C07D317/64B01J31/0239B01J31/183B01J2531/025B01J2531/72B01J35/19
Inventor 张晓峰李思雨吕名秀曹毅王延伟
Owner HENAN INST OF ENG
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