Method of preparing cyclic carbonate by converting zinc-based catalyst into carbon dioxide

A cyclic carbonate, zinc-based catalyst technology, used in chemical instruments and methods, physical/chemical process catalysts, catalytic reactions, etc., can solve problems such as low efficiency, save energy, shorten reaction time, and reduce pressure equipment. desired effect

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

[0020] The zinc-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, add 50mg (active component zinc 0.5mol%) catalyst conjugated zinc 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 was 88%.

Embodiment 2

[0023] The zinc-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, 50mg (active component zinc 0.3mol%) catalyst conjugated zinc porphyrin microporous polymer material, 12.5mmol butylene oxide and 0.9mmol cocatalyst tetra-n-butyl bromide were sequentially added 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 86%.

Embodiment 3

[0026] The zinc-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, add 50mg (active component zinc 0.5mol%) of catalyst conjugated zinc porphyrin microporous polymer material, 12.5mmol epichlorohydrin and 0.675mmol cocatalyst tetra-n-butyl bromide ammonium chloride, feed carbon dioxide and keep the pressure at 0.1 MPa, stir at 25°C for 12 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 88%.

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Abstract

The invention discloses a method of preparing cyclic carbonate by converting zinc-based catalyst into carbon dioxide. The method of preparing the cyclic carbonate by converting the zinc-based catalystinto the carbon dioxide uses the carbon dioxide and epoxides as raw material, conjugated zinc porphyrin / conjugated zinc porphyrin biphenyl amine microporous polymer material as heterogeneous catalysts, and tetra-n-butylammonium bromide as co-catalysts, and achieving high efficiency green catalytic synthesis of cyclic carbonate under normal temperature and pressure without solvent. The method ofpreparing the cyclic carbonate by converting the zinc-based catalyst into the carbon dioxide has the main advantages of simple preparation method, low cost, high catalytic activity, stable structuralperformance, easy recovery, reusable, mild reaction conditions, fast speed, operational safety and applicability 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 zinc-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 significanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/36C07D317/64B01J31/22
CPCB01J31/1691B01J2231/32B01J2531/0213B01J2531/0238B01J2531/26C07D317/36C07D317/64
Inventor 王延伟张晓峰翟圣国曹毅许志忠
Owner HENAN INST OF ENG
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