A kind of catalyst preparation kettle for carbon dioxide-propylene oxide copolymer preparation

Abstract

The invention discloses a catalyst preparation kettle used for preparing a carbon dioxide-epoxypropane copolymer, which comprises a cylindrical kettle body, the kettle body is vertically arranged, a center rotating shaft connected to an external first motor is vertically arranged in the kettle body, a stirrer is arranged on the center rotating shaft, the stirrer comprises a U-shaped stirring frame and a stirring blade positioned in the U-shaped stirring frame, an eccentric rotating shaft which is connected to an external second motor and is parallel to the center rotating shaft is arranged in the kettle body, an emulgator is arranged at the lower end of the eccentric rotating shaft, the emulgator is positioned between the U-shaped stirring frame and the stirring blade, the stirring blade comprises two sheets of flat and straight blades which are interlaced and arranged on the center rotating shaft and two sheets of vertical straight blades which are respectively fixed and arranged at the free ends of the flat and straight blades, the catalyst preparation kettle has the advantages that under dual-function condition of stirring and emulsification, various catalysts are fully fixed and emulsified, catalyst effect can be performed with max limitation, so that the reaction efficiency and product yield can be increased.

Description

technical field [0001] The invention relates to a catalyst preparation kettle, in particular to a catalyst preparation kettle used for the preparation of carbon dioxide-propylene oxide copolymer. Background technique [0002] The depletion of petroleum resources, the worsening of the greenhouse effect, and the rapid spread of white pollution have become the three major environmental problems that human society needs to solve urgently. Polymethylethylene carbonate (PPC) is a kind of propylene oxide and CO 2 Polymerized polymer materials were first synthesized in 1969 by Shohei Inoue of Tokyo Metropolitan University in Japan. As a new type of non-complete petroleum-based plastic, its raw material does not come entirely from petroleum, thereby reducing the dependence on petroleum resources. In addition, PPC starts with CO 2 As one of the monomers, gas has the characteristics of full degradation while utilizing "greenhouse gas", which can effectively reduce "white pollution"....

AI Technical Summary

Problems solved by technology

[0003] The existing carbon dioxide - propylene oxide copolymer is made by adding carbon dioxide (CO 2 ) and propylene oxide (PO) are placed in a synthesis reaction kettle, the temperature and pressure in the kettle are controlled, and the reaction synthesis is carried out directly under the action of a catalyst. Usually, the catalyst used in the reaction process is diethyl zinc (which is used to produce carbon dioxide-based One of the most important catalyst monomers used in the process of fully degrading plastic resins), co-catalysts (such as rare earth salts) and polyols (such as glycerin), etc., directly add diethyl zinc, rare earth salts and glycerin to the reactants , each catalyst cannot achieve the effect of complete fusion with each other, resulting in the weakening of the catalytic effect of the catalyst and the low catalytic efficiency of the catalyst, resulting in a decrease in reaction efficiency and a decrease in output rate

Images