Method for preparing dicarboxylic acid zinc catalyst with rheological phase reaction method

Abstract

The invention relates to a method for preparing a dicarboxylic acid zinc catalyst used in carbon dioxide and alkyleneoxide copolymerization reaction. The method comprises the steps of mixing zinc oxide, dicarboxylic acid and an organic solvent or water in an airtight reactor into a rheological phase state, keeping certain time at constant temperature, then filtering, washing with acetone, vacuumizing for 24 hours at 100 DEG C, and finally obtaining the dicarboxylic acid zinc catalyst. The method for preparing the dicarboxylic acid zinc catalyst has high efficiency and energy saving and is suitable for industrial production. In the rheological phase system, solid particles are uniformly distributed and closely contacted in fluid, the heat transfer and the mass transfer are stable, the temperature is uniform and is easily controlled, the reaction is more fully conducted, and the yield is high. The reaction does not need a large number of scattered medium and does not need stirring, the process is greatly simplified, and the production cost can be greatly reduced.

Description

technical field [0001] The invention relates to a catalyst preparation technology, in particular to a method for preparing a dibasic carboxylate zinc catalyst by applying a rheological phase reaction method. Background technique [0002] Carbon dioxide is the most important greenhouse gas. Using industrial waste gas carbon dioxide and alkylene oxide as raw materials to synthesize polymer materials can not only reduce the dependence on petroleum resources, but also turn carbon dioxide into treasure and realize its resource utilization. High polymer materials are biodegradable and are environmentally friendly materials. They are expected to replace general-purpose plastics and reduce "white pollution", which is one of the important development directions in the field of polymer technology. [0003] The key technology for the preparation of polycarbonate by the copolymerization of carbon dioxide and alkylene oxide is the catalyst. Researchers from all over the world have develo...

AI Technical Summary

Problems solved by technology

The preparation process of these zinc dicarboxylates often requires a large amount of organic solvent or water medium, and in order to make the reactants fully contact, strong stirring is required, which not only increases equipment investment, but also has long reaction time, high energy consumption and high preparation cost.

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