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Catalyst for preparing cyclic carbonate compound by taking CO2 as raw material

A cyclic carbonate and catalyst technology, applied in organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical/physical process and other directions, can solve problems such as poor circular economy and achieve high-efficiency reaction Effect

Active Publication Date: 2020-08-21
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, catalysts developed for this reaction include magnesium oxide promoted with nanocrystalline lithium (K.B.Rasal, G.D.Yadav, R.Koskinen, et al. Molecular Catalysis, 2018) and 4(5)-hydroxyimidazole, potassium iodide system (Werner, Thomas, Tenhumberg, Nils, Büttner, Hendrik.Chemcatchem, 2014(12): 3493-3500), but the response to circular economy is poor

Method used

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  • Catalyst for preparing cyclic carbonate compound by taking CO2 as raw material
  • Catalyst for preparing cyclic carbonate compound by taking CO2 as raw material
  • Catalyst for preparing cyclic carbonate compound by taking CO2 as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1: Preparation of DBUHBO 2 , mix 1.5mmol DBU with an equivalent amount of HBO 2 Add them together into a 22mL stainless steel autoclave with polytetrafluoroethylene lining, seal the autoclave, vacuumize it, put it into an oil bath at a constant temperature, and stir at a constant speed to carry out the synthesis reaction. After the reaction, use a deuterated reagent as a solvent for nuclear magnetic resonance spectrum detection, and the boron spectrum is as follows: figure 1 As shown, a single peak appears at 1.45ppm, indicating that there is only one form of boron in this substance, namely BO 2 - is the only form; H NMR spectrum such as figure 2 As shown, similar to the H NMR spectrum of DBU, the C NMR spectrum is as image 3 As shown, the number of carbon atoms is also consistent with DBU, indicating that DBU as a cation donor does not change the carbon skeleton structure after the reaction; the infrared spectrum is as follows Figure 4 As shown, the N-H...

Embodiment 2

[0028] Embodiment 2: Preparation of chloromethyl dioxolanone, reaction flow diagram sees Image 6 . Add 2mmol epichlorohydrin and a specific amount of ionic liquid into a 22mL stainless steel autoclave with a polytetrafluoroethylene liner, seal the autoclave, and fill it with a certain pressure of CO after vacuuming. 2 Gas, put the reactor into a constant temperature oil bath, stir, and carry out the synthesis reaction. After the reaction, the yield of chloromethyldioxolanone can be calculated by using the deuterated reagent as the solvent and N,N-dimethylformamide (DMF) as the internal standard by proton nuclear magnetic resonance spectroscopy.

Embodiment 3

[0029] Embodiment 3: In order to investigate the reactivity of different catalysts to catalyze the generation of chloromethyl dioxolanone, the following experiments were carried out, and the reaction conditions were: epichlorohydrin (2mmol), different catalysts (1.5mmol), CO 2 The pressure is 0.1MPa, the reaction temperature is 30°C, and the reaction time is 4h. The results are shown in Table 1. DBUHBO 2 best catalytic activity.

[0030] The impact of different catalysts on the reaction yield in table 1

[0031]

[0032]

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Abstract

The invention provides a catalyst for preparing a cyclic carbonate compound by taking carbon dioxide (CO2) and an epoxypropane derivative as raw materials. The catalyst is ionic liquid containing metaborate anions (BO2<->). The cyclic carbonate compound can be prepared under the conditions of no additional organic solvent and lower CO2 pressure. According to the method, the catalyst is easy to synthesize, the process is green and simple, no pollution is caused, and the application value is high. Research on a reaction mechanism finds that basic anions BO2<-> in the ionic liquid are the key toa catalytic reaction, CO2 can be effectively adsorbed, ring opening of the epoxypropane derivative is promoted, and then the cyclic carbonate compound is generated through the reaction.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical industry, and relates to a preparation method of cyclic carbonate compounds, which is a kind of 2 Catalysts for the preparation of cyclic carbonate compounds from raw materials. Background technique [0002] carbon dioxide (CO 2 ) is the main greenhouse gas, but it is also the cheapest and most abundant carbon resource in the C1 family, CO 2 The research on the immobilization and resource utilization of cellulose is one of the important topics that are generally concerned by countries all over the world, and it has also been listed as a key research and development project in my country. Due to CO 2 The middle carbon atom is already in the highest oxidation state, and the standard Gibbs free energy is -394.38kJ·mol -1 , so the chemical properties are stable. To overcome the CO 2 thermodynamic stability and reaction inertness, to achieve CO 2 The chemical conversion of organic bases and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/36B01J31/02
CPCC07D317/36B01J31/0282B01J31/0298
Inventor 胡佳音王铮邓天龙陈尚清郭亚飞
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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