Separating system and separating method for residual monomers in polymer viscous liquid

Abstract

The invention discloses a separating system and a separating method for residual monometers in a polymer viscous liquid. The separating system comprises a gas supply device, a gas heating device, a separating device and a vacuumizing device, wherein the separating device comprises a reactor / a material filling tank, a condenser and a storage tank, wherein the reactor / the material filling tank is provided with a stirrer, and a gas dispersing pipe is mounted at the bottom of the reactor / the material filling tank. Gas provided by the gas supply device enters the gas dispersing pipe which is mounted at the bottom of the reactor / the material filling tank after passing through a gas heating device; the gas is blown to the polymer viscous liquid through the gas dispersing pipe, so that the viscous liquid is bubbled and the residual monomers are evaporated; evaporated residual monomers and the gas enter the condenser together under the action of vacuum, the residual monomers and the gas are separated by condensing; the residual monomers enter the storage tank and are stored in the storage tank. According to the separating system and the separating method, equipment is simple; process parameters are easy to control; the energy consumption is low; the processing amount is large. The separating system and the separating method can be used for separating the residual monomers from the polymer viscous liquid.

Description

technical field [0001] The invention relates to the separation technology of residual monomer in polymer viscous liquid. Background technique [0002] In the fine chemical industry, it is often necessary to separate the solvent molecules and residual monomer molecules in the polymer viscous liquid, usually by solvent extraction and vacuum distillation, but for some heat-sensitive polymers with high viscosity, high molecular weight and high boiling point However, such conventional methods cannot separate the residual monomers in such polymers well. Now the international method for separating residual monomers in such polymers is thin film evaporation. [0003] The thin-film evaporation method is to scrape the processed prepolymer into a thin film from the rotating scraper on the upper part of the evaporator to slowly flow down. The heating time of the material is shortened to a few minutes, the evaporation area is large, and the residual monomer evaporates quickly. However, ...

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Problems solved by technology

[0006] In order to solve the problems of high equipment cost and high technical difficulty in the current monomer separation methods such as thin film evaporation, the present invention proposes a system and separation method for separating residual monomers in polymer viscous liquids, which solves the existing problems in the prior art. lack of

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