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Method for preparing cyclic carbonate by aluminum-based catalysts

A cyclic carbonate and catalyst technology, which is applied in the field of preparing cyclic carbonates with aluminum-based catalysts, can solve the problem of low efficiency, and achieve the effects of saving energy, reducing the requirements of pressure equipment and low cost.

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 conjugated aluminum porphyrin with simple synthesis steps, cheap and easy-to-obtain raw materials, high catalytic efficiency, stability and easy recovery in view of the problem that the current reaction system has low efficiency under mild conditions. The phyline bipyridine / conjugated aluminum porphyrin bipyrrole microporous polymer material can be efficiently converted into cyclic carbonate under normal temperature and pressure and solvent-free conditions, which can be widely used in industrial production fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The aluminum-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, sequentially add 50mg (active component aluminum 0.5mol%) catalyst conjugated aluminum 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 94%.

Embodiment 2

[0022] The aluminum-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 aluminum 0.5mol%) of catalyst conjugated aluminum 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 92%.

Embodiment 3

[0025] The aluminum-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 aluminum 0.5mol%) catalyst conjugated aluminum 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 95%.

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Abstract

The invention discloses a method for preparing cyclic carbonate by aluminum-based catalysts. According to the method, carbon dioxide and epoxide serve as raw materials, conjugate aluminum porphyrin dipyridyl / conjugate aluminum porphyrin dipyrrole micro-porous polymer materials serve as heterogeneous catalysts, tetra-n-butylammonium bromide serves as a co-catalyst, and the cyclic carbonate is efficiently and greenly catalyzed and synthesized at normal temperature and normal pressure in a solvent-free manner. The method mainly has the advantages that the catalysts are simple in preparation method, low in cost, high in catalytic activity, stable in structure performance, easy to recycle, reusable, mild in reaction condition, rapid, 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 aluminum-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
CPCB01J31/1691B01J2231/32B01J2531/0213B01J2531/0238B01J2531/31C07D317/36C07D317/64
Inventor 王娜张晓峰陈垒曹毅王延伟
Owner HENAN INST OF ENG
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