Application method of catalysts capable of synthesizing cyclic carbonate under normal temperature and atmosphere

A cyclic carbonate, application method technology, applied in catalytic reactions, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low catalyst activity and high cost, and achieve high activity. , low price, mild reaction conditions

Active Publication Date: 2018-10-26
WUHAN IL CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the deficiencies of related products in the prior art, the present invention proposes an application method based on a catalyst for synthesizing cyclic carbonates at normal temperature and pressure to solve the problem of low catalyst activity and low cost in the existing cyclic carbonate synthesis process. Expensive and other issues

Method used

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  • Application method of catalysts capable of synthesizing cyclic carbonate under normal temperature and atmosphere
  • Application method of catalysts capable of synthesizing cyclic carbonate under normal temperature and atmosphere

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Experimental program
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Effect test

Embodiment 1

[0025]In a 50mL stainless steel autoclave, add 9.25g (0.1mol) of epichlorohydrin, 1.752g (0.005mol) of N-methyl-N-dodecylmorpholine ammonium bromide (the preparation refers to N-methyl -The preparation of N-hexadecylmorpholine ammonium bromide, only dodecyl bromide replaces hexadecane bromide) as the main catalyst, 0.84g (0.005mol) cobalt acetate is the cocatalyst, and the airtight reaction kettle is continued Introduce carbon dioxide, keep the pressure in the kettle at 0.1MPa, slowly raise the temperature to 35°C, react for 24 hours, cool to room temperature, slowly release the pressure, and distill the resulting liquid under reduced pressure to obtain the product 4-chloromethyl-[1, 3] The yield of dioxolan-2-one cyclic carbonate was detected by gas chromatography spectrometry and NMR, and the yield was 98.2%. The NMR data are as follows: 1 HNMR (CDCl 3 , 300MHz): δ (ppm): 3.78 (dd, J = 3.6, 12.3Hz, 1H); 3.86 (dd, J = 4.9, 12.3Hz, 1H); 4.44 (dd, J = 5.7, 8.8Hz, 1H) ; 4.64 ...

Embodiment 2

[0027] With the reaction conditions and detection method in embodiment 1, change main catalyst used into 1.61g (0.005mol) N-methyl-N-decylmorpholine ammonium bromide (its preparation is with reference to N-methyl-N-decyl ammonium bromide) The preparation of hexaalkylmorpholine ammonium bromide, only decane bromide is replaced hexadecane bromide), cocatalyst changes zinc bromide 0.225g (0.001mol), obtains 4-chloromethyl-[1,3 ] Dioxolan-2-one with a yield of 75.4%.

Embodiment 3

[0029] With reaction conditions and detection method in embodiment 1, change main catalyst used into 0.306g (0.001mol) N-methyl-N-dodecylmorpholine ammonium chloride (its preparation is with reference to N-methyl-N- -The preparation of hexadecylmorpholine ammonium bromide, only dodecyl chloride is replaced hexadecane bromide), promotor changes magnesium sulfate 0.012g (0.0001mol), obtains 4-chloromethyl-[1 , 3] Dioxolan-2-one, the yield was 86.7%.

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Abstract

The invention discloses an application method of catalysts capable of synthesizing cyclic carbonate under normal temperature and atmosphere and relates to the field of chemical reaction engineering. The application method of the catalysts capable of synthesizing cyclic carbonate under the normal temperature and atmosphere includes the steps that an epoxy compound and carbon dioxide are adopted asreactants, a morpholine ionic liquid or ionic liquid crystal is adopted as the main catalyst, and a metal inorganic salt the chemical formula of which is MY is adopted as the auxiliary catalyst, wherein without presence of organic solvents, the reaction temperature is 25-40 DEG C, the reaction time is 1-24 hours, the reaction pressure is 0.1 Mpa, and the molar proportion of the reactants to the catalysts is (100:1)-(10:1); the epoxy compound and carbon dioxide are subjected to a cycloaddition reaction to obtain cyclic carbonate. The reaction conditions are mild and friendly, the reaction can be carried out under the normal temperature and pressure, the technological process is simple, and meanwhile, the morpholine ionic liquid or ionic liquid crystal is adopted as the main catalyst. Prepared cyclic carbonate is adjustable in structure, high in the stability and easy to separate and can be used repeatedly several times without changing the catalytic activity, and the auxiliary catalystand the main catalyst are low in price and high in activity.

Description

technical field [0001] The invention relates to the field of chemical reaction engineering, in particular to an application method based on a catalyst for synthesizing cyclic carbonate at normal temperature and pressure. Background technique [0002] Due to the continuous consumption of fossil fuels, the content of carbon dioxide in the atmosphere is increasing day by day, and the accompanying many environmental problems have attracted more and more people's attention. At the same time, carbon dioxide is the most abundant source of C1 in nature. How to effectively activate carbon dioxide, fix it and convert it into high value-added products has become one of the most challenging issues in this century. [0003] Based on the consideration of atom economy, cycloaddition of epoxy compound and carbon dioxide to generate cyclic carbonate is one of the good conversion pathways, and the product cyclic carbonate itself is a very good polar aprotic solvent. There is important applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/36B01J31/04B01J31/26B01J31/32B01J31/34B01J31/30B01J31/28
CPCB01J31/0282B01J31/26B01J31/28B01J31/30B01J31/32B01J31/34B01J2231/34C07D317/36
Inventor 周晓海周夏衍张海波龚青
Owner WUHAN IL CHEM TECH
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