Production process of CPVC resin by adopting aqueous phase suspension method

Abstract

The invention discloses a production process of CPVC resin by adopting an aqueous phase suspension method, and relates to the technical field of chlorinated polyvinyl chloride production. The method comprises the following steps of: purifying, suspending and polymerizing a polyvinyl chloride suspension polymerization system to obtain a mixed mother solution; heating the mixed mother solution containing polyvinyl chloride by a heating box, and introducing the heated mixed mother solution into a primary reaction kettle for primary chlorination reaction; introducing the mixed material after the primary reaction and chlorine into a disperser at the same time for strong dispersion, performing heating by a heating box after filtering, and then introducing the mixture into an intermediate reaction kettle for intermediate chlorination reaction. According to the invention, the heating box, the disperser and multi-stage chlorination are designed, the temperature difference between the mixed mother solution and the inside of the primary reaction kettle is avoided, caked materials are filtered in the disperser to be continuously dispersed, the reaction speed is increased, the reaction time isshortened, the materials are prevented from being caked, the chlorination reaction is uniform, the product quality is high, and continuous production of chlorinated polyvinyl chloride is achieved.

Description

technical field [0001] The invention belongs to the technical field of chlorinated polyvinyl chloride production, and in particular relates to a production process of CPVC resin by an aqueous phase suspension method. Background technique [0002] CPVC resin is an important polymer material. According to different dispersion media, there are three main production methods of CPVC: solvent method, solid phase method and aqueous phase suspension method. Affected by environmental protection, energy consumption, process, etc., solvent method has been Basically eliminated. At present, domestic CPVC resin has two production methods: solid phase method and water phase suspension method, and the water phase suspension method is the main method. At present, the aqueous phase suspension process is used to prepare chlorinated polyvinyl chloride. The common one is the chlorination reactor. The general material is an enamel reactor or an alloy reactor, which is a batch reactor. The reactio...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of production technology of water-phase suspension method CPVC resin, through the design of heating box, disperser and multi-stage chlorination, solve existing water-phase suspension technology to prepare chlorinated polyvinyl chloride, material infiltration Slow, uneven dispersion, slow reaction speed, easy agglomeration of materials, uneven chlorination, and reduced product quality