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Method for preparing cyclic carbonate by converting carbon dioxide through cobalt-based catalyst

A cyclic carbonate, cobalt-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 simple separation and easy availability of raw materials

Inactive Publication Date: 2018-05-01
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
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Effect test

Embodiment 1

[0020] The cobalt-based catalyst conversion carbon dioxide of the present embodiment prepares the method for cyclic carbonate, and the steps are as follows:

[0021] Into a 10mL stainless steel autoclave, sequentially add 50mg (active component cobalt 0.5mol%) of catalyst conjugated cobalt porphyrin microporous polymer material, 12.5mmol propylene oxide and 0.9mmol cocatalyst tetra-n-butyl bromide Ammonium, 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 isolated yield of cyclic carbonate after purification 99%.

Embodiment 2

[0023] The cobalt-based catalyst conversion carbon dioxide of the present embodiment prepares the method for cyclic carbonate, and the steps are as follows:

[0024] Into a 10mL stainless steel autoclave, sequentially add 50mg (active component cobalt 0.4mol%) of catalyst conjugated cobalt porphyrin microporous polymer material, 12.5mmol of butylene oxide and 0.9mmol of cocatalyst tetra-n-butyl bromide ammonium chloride, feed carbon dioxide and keep the pressure at 0.1 MPa, 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 isolated product of cyclic carbonate after purification The rate is 97%.

Embodiment 3

[0026] The cobalt-based catalyst conversion carbon dioxide of the present embodiment prepares the method for cyclic carbonate, and the steps are as follows:

[0027] Into a 10mL stainless steel autoclave, sequentially add 50mg (active component cobalt 0.5mol%) of catalyst conjugated cobalt porphyrin microporous polymer material, 12.5mmol epichlorohydrin and 0.9mmol cocatalyst tetra-n-butyl bromide ammonium chloride, feed carbon dioxide and keep the pressure at 0.1 MPa, 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 isolated product of cyclic carbonate after purification The rate is 99%.

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Abstract

The invention discloses a method for preparing cyclic carbonate by converting carbon dioxide through a cobalt-based catalyst. According to the method, carbon dioxide and epoxide are utilized as raw materials, a conjugated cobalt porphyrin microporous polymer material is utilized as a heterogeneous catalyst, tetra n-butyl ammonium bromide is utilized as a cocatalyst, and high-efficiency and green catalysis is achieved to synthesize cyclic carbonate under normal temperature and normal pressure and without solvent. The method has the main advantages of simpleness in catalyst preparation method, low cost, high catalytic activity, stable structure performance, easiness in recycling, capability of being reutilized, moderate reaction conditions, quick speed, safety in operation and suitability 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 by converting carbon dioxide with a cobalt-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 significa...

Claims

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Application Information

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IPC IPC(8): C07D317/36C07D319/06C07D317/50B01J31/22
CPCC07D317/36C07D317/50C07D319/06B01J31/1691B01J31/183B01J2531/845B01J2531/025B01J35/19
Inventor 张晓峰李延勋陈振宇曹毅王延伟
Owner HENAN INST OF ENG
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