Method for preparing cyclic carbonate by iron-based catalyst

A technology of cyclic carbonate and iron-based catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low efficiency and save energy , Raw materials are easily available, and the effect of high catalytic efficiency

Inactive Publication Date: 2018-03-23
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 iron-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 iron 0.5mol%) of catalyst-conjugated iron 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 99%.

Embodiment 2

[0022] The iron-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 iron 0.3mol%) of catalyst-conjugated iron 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 96%.

Embodiment 3

[0025] The iron-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 iron 0.5mol%) of catalyst-conjugated iron 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, at a temperature of 25°C, stir for 36 hours, cool at room temperature, slowly release the remaining carbon dioxide, filter and separate the catalyst, and obtain a cyclic carbonate after purification The isolated yield was 99%.

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Abstract

The invention discloses a method for preparing cyclic carbonate by an iron-based catalyst. Carbon dioxide and epoxide serve as raw materials, a conjugate ferriporphyrin dipyridyl / conjugate ferriporphyrin dipyrrole microporous polymer material serves as a heterogeneous catalyst, tetra-n-butylammonium bromide serves as a co-catalyst, and efficient green catalytic synthesis of cyclic carbonate is realized at normal temperature and pressure in a solvent-free manner. The method mainly has the advantages that the catalyst is simple in preparation method, low in cost, high in catalytic activity, stable in structural performance, easy to recycle, reusable, mild in reaction condition, high in speed, safe to operate and applicable to 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 an iron-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 organic...

Claims

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Application Information

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IPC IPC(8): C07D317/44C07D317/36C07D317/38C07D317/72B01J31/22
CPCC07D317/36C07D317/38C07D317/44C07D317/72B01J31/1691B01J31/183B01J2531/842B01J2531/025B01J35/19
Inventor 张晓峰王娜王世民曹毅王延伟
Owner HENAN INST OF ENG
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