Cobalt complex conjugated microporous polymer catalyst, and preparation and application thereof

Abstract

The invention researches and develops a novel catalyst capable of catalyzing the reaction of CO2 with epoxyalkane to produce cyclic carbonate at a temperature of 0 to 160 DEG C and a pressure of 0.1 to 6 MPa and a preparation and application thereof. The catalyst is a cobalt complex conjugated microporous polymer CMP[Salen-Co-R1] and has structural formulas of CMP-1, CMP-2 and CMP-3 as described in the specification; in the formulas, R1 is -OAc, -Cl, -Br or -I, and R2 is -H, -tBu, -iBu, -NO2, -Cl, -CH2NEt2 or -CH2N(Bn)Et2Br. The polymer catalyst is used to catalyze the reaction of CO2 and epoxyalkane at normal temperatures and pressures, yield of obtained cyclic carbonate is 35 to 90%, and repeated usage of the catalyst almost poses no influence to the yield; the yield is more than 90% when the reaction is carried out at a high temperature of 50 to 120 DEG C and a high pressure of 2 to 6 MPa for 1 to 3 h. According to the invention, catalysis of the reaction of CO2 with epoxyalkane is realized under mild reaction conditions, so restriction of high temperatures and pressures on the reaction is overcome; and the catalyst can be repeatedly used, so the problem of a low utilization rate of the catalyst in the prior art is overcome.

Description

technical field

[0001] The present invention has synthesized metal cobalt complexed conjugated microporous polymer CMP[Salen-Co-R 1 ], and used it as a catalyst to catalyze CO under mild conditions 2 The cyclic carbonate is synthesized by reacting with alkylene oxide, and the repeated use of the polymer catalyst has almost no influence on the yield of the cyclic carbonate. Background technique

[0002] CO 2 It is one of the most abundant carbon sources on the earth, and has many advantages such as large reserves, safety, non-toxicity, and cheapness. However, CO 2 It is also one of the main greenhouse gases. In recent years, due to the CO in the atmosphere 2 The concentration of CO2 is constantly rising, the greenhouse effect is constantly increasing, leading to global warming, and at the same time, disastrous weather is becoming more frequent. Therefore, how to process and utilize CO more conveniently 2 has become more important. It is of great significance to the devel...

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