Preparation and catalysis behavior of highly dispersed zinc glutarate catalyst adopting silanization modified molecular sieve as carrier

Abstract

The present invention discloses a preparation method of an efficient catalyst for catalyzing CO2 and epoxy alkane to synthesize a biodegradable material. The preparation method is characterized in that a dipping method and an in situ activation method are adopted to load zinc glutarate on the surface of a silanization modified molecular sieve in a nano-size manner to obtain the highly dispersed inhomogeneous catalyst, wherein the catalyst can be uniformly dispersed in an organic solvent system so as to reduce agglomeration between active centers, and has high catalysis activity. According to the present invention, with application of the catalyst to catalyze copolymerization of CO2 and propylene oxide, the maximum catalysis efficiency achieves 81.5 g of polymer / g of zinc glutarate, the obtained polymerization product Mn is 65800, the polycarbonate segment is 98.4%, and the polymerization product can be completely degraded into CO2 and H2O in the natural environment; and the catalyst has characteristics of simple preparation process and high catalysis efficiency, and the reliable new technology is provided for degradable material synthesis through industrial utilization of CO2 and epoxy alkane.

Description

technical field [0001] The invention relates to a preparation method of a highly dispersible zinc glutarate catalyst with a silanized modified molecular sieve as a carrier, and its use in catalyzing CO 2 The application of the copolymerization reaction with alkylene oxide belongs to the field of industrial catalysis and polymer chemistry. Background technique [0002] CO 2 is a greenhouse gas, and it is predicted that by 2030 the global CO 2 The amount of emissions may exceed 38 billion tons, and the resulting greenhouse effect will seriously threaten human existence. On the other hand, CO 2 It is the most abundant cheap carbon resource on the earth, with a total amount of about 2.75×10 12 tons, more than coal, oil, and natural gas combined; most importantly, CO 2 Odorless, non-toxic, stable molecular structure, can be converted into a variety of important chemicals; from the perspective of environmental protection and resource utilization, research on CO 2 The various...

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Problems solved by technology

However, the preparation process of the catalyst requires the use of a large amount of toluene, which is highly toxic and expensive

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