Catalytic system for synthesizing annular carbonic acid ester

Abstract

The invention discloses a catalytic system used for synthesizing cyclic carbonate ester. The catalytic system comprises a catalyst with structural unit shown in formula I and quaternary ammonium salt shown in a general structure of formula II, wherein n is equal to 1-4 in the general structure of formula II. The catalytic system is suitable for catalyzing the reaction system in which carbon dioxide reacts with epoxy compound to synthesize the cyclic carbonate ester, in the reaction system, all the various epoxy compounds are applicable to the method, such as propylene oxide, epoxy chloropropane, styrene oxide, 2,3-glycidyl phenyl ether or cyclohexene oxide; the reaction temperature is 30-80 DEG C; the pressure of carbon dioxide is 2-12 MPa; and reaction time is 1-24 h. Compared with the conventional method, the catalytic system has the advantages of mild reaction condition, high recovery rate and high selectivity, and reuse of the major catalyst metal-organic coordination polymer (MOF-5) by simple filtration. Therefore, the catalytic system has strong industrial application value.

Description

technical field [0001] The invention relates to a catalyst and a catalytic system for synthesizing cyclic carbonates, in particular to a catalyst and a catalytic system for synthesizing cyclic carbonates from carbon dioxide and epoxy compounds through cycloaddition reactions. Background technique [0002] Carbon dioxide is the most important greenhouse gas, and it is also the most abundant and cheapest carbon resource on the earth. Chemical fixation of carbon dioxide can not only alleviate the "greenhouse effect", but also obtain high value-added products, meet the requirements of green chemistry, and have great environmental effects and economic benefits. Therefore, it has become an important topic of general concern in all countries in the world (D.H.Gibson, Chem. Rev., 1996, 96, 2063; T. Sakakura et al., Chem. Rev., 2007, 107, 2365). Among them, using carbon dioxide to react with epoxy compounds to form cyclic carbonates is one of the important ways to successfully utili...

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Problems solved by technology

However, the above-mentioned catalytic system still has problems such as low catalytic activity, difficulty in catalyst synthesis, high temperature and high pressure for the reaction, or the need to add toxic organic solvents.

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