Novel coagulation washing kettle used for preparation of carbon dioxide-epoxy propane copolymer

Abstract

The invention discloses a novel coagulation washing kettle used for preparation of a carbon dioxide-epoxy propane copolymer. The washing kettle comprises a cylindrical kettle body which is vertically arranged. A central rotating shaft connected with an outer motor is longitudinally arranged in the kettle body. The washing kettle is characterized in that the lower end of the central rotating shaft is equipped with a plurality of ellipsoidal stirrers in a parallel manner longitudinally, the ellipsoidal stirrers are surrounded by a plurality of hollow oval stirring frame blades arranged on the central rotating shaft, a filter device is arranged on the side wall of the interior of the kettle body, a washing solution discharge pipe is arranged on the part, corresponding to the filter device, of the outer wall of the kettle body, the distance of the angle of the adjacent oval stirring frame blades is the same, the horizontal diameters of the oval stirring frame blades are different, and the height of the oval stirring frame blade is 1/8-1/6 of the length of the central rotating shaft. The novel coagulation washing kettle has advantages that the unreacted reaction material adhered to the surface of a solid polymer is completely separated from the solid polymer, and a polymer is collected through a material outlet, so that the yield and quality of the solid polymer are improved.

Description

technical field [0001] The invention relates to a washing tank, in particular to a novel condensation washing tank used for the preparation of carbon dioxide-propylene oxide copolymer. Background technique [0002] The washing kettle is a large-scale vertical pressure vessel washing equipment used in the field of chemical equipment. It is mainly used to fully stir the material in the liquid, perform suspension washing and remove the organic solvent adhered to the surface of the material. The existing washing kettle device includes a kettle body, which is provided with a stirring blade and a filter device. After the organic solvent is discharged through the filter port, the solid material is discharged through the material outlet to achieve the purpose of separating the polymer from the solvent. Part of the organic solvent still adheres to the surface of the solid material, which cannot be completely removed, and the purpose of completely separating the polymer from the solve...

AI Technical Summary

Problems solved by technology

The existing washing kettle device includes a kettle body, which is provided with a stirring blade and a filter device. After the organic solvent is discharged through the filter port, the solid material is discharged through the material outlet to achieve the purpose of separating the polymer from the solvent. Part of the organic solvent still adheres to the surface of the solid material, which cannot be completely removed, and the purpose of completely separating the polymer from the solvent cannot be achieved, reducing the product quality and yield of the solid polymer

At present, there is no relevant research report on the coagulation washing tank used for the preparation of carbon dioxide-propylene oxide copolymers that completely separates the incompletely reacted material adhering to the surface of the solid polymer from the solid polymer at home and abroad.

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