Method for preparing cyclic carbonate by transforming carbon dioxide with iron-based catalyst

A cyclic carbonate, iron-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: 2018-05-01
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 lo

Method used

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Comparison scheme
Effect test

Embodiment 1

[0020] The iron-based catalyst of the present embodiment converts carbon dioxide to prepare the method for cyclic carbonate, the steps are as follows:

[0021] Into a 10mL stainless steel autoclave, sequentially add 50mg (active component iron 0.45mol%) of catalyst-conjugated iron 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 iron-based catalyst of the present embodiment converts carbon dioxide to prepare the method for cyclic carbonate, the steps are as follows:

[0024] Into a 10mL stainless steel autoclave, add 50mg (active component iron 0.3mol%) of catalyst-conjugated iron 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 iron-based catalyst of the present embodiment converts carbon dioxide to prepare the method for cyclic carbonate, the steps are as follows:

[0027] Into a 10mL stainless steel autoclave, add 50mg (active component iron 0.5mol%) of catalyst-conjugated iron 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 99%.

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Abstract

The invention discloses a method for preparing cyclic carbonate by transforming carbon dioxide with an iron-based catalyst. The carbon dioxide and epoxide are taken as raw materials, a conjugated ferriporphyrin microporous polymer material is taken as a multiphase catalyst, and tetra-n-butylammonium bromide is taken as a co-catalyst to realize high-efficiency green catalytic synthesis of the cyclic carbonate under a normal-temperature, normal-pressure and solvent-free condition. The method has the major advantages of simple preparation method, low cost, high catalytic activity, stable structural performance, easiness in recycling and reusability of the catalyst, mild reaction conditions, high rate and safety in operation, and 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 by converting carbon dioxide 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 significan...

Claims

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Application Information

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IPC IPC(8): C07D317/36C07D317/64B01J31/22
CPCB01J31/0239B01J31/183B01J35/0006B01J2531/025B01J2531/842C07D317/36C07D317/64
Inventor 张晓峰陈振宇王世民曹毅王延伟
Owner HENAN INST OF ENG
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