METHOD OF FORPOLYMERISATION OF MONODISPERSED PARTICLES Russian patent published in 2014 - IPC C08F2/01 C08F12/08 C08F112/08 C08F212/08 B01J2/06 B01J2/10 

FIELD: chemistry.

SUBSTANCE: invention relates to a technology of production of polymer granules, used to obtain ion-exchange resins. The method includes supply of an emulsion of monodispersed drops into a reactor, mixing the emulsion until the gelation point is reached and the supply of drops, which have passed forpolymerisation, to further processing. First, a stabiliser is supplied until it fills the reactor and gets into a system of the stabiliser circulation, after which the emulsion of monodispersed drops, displacing an excessive volume of the stabiliser into the circulation system, is supplied into the reactor. Consumption of the stabiliser, supplied through the upper zone of the reactor, is determined basing on condition of formation of an evenly boiling suspended layer of the monodispersed drops, located at 500-700 mm distance above the reactor bottom. Location of the layer of monodispersed drops id controlled by means of a capacity sensor, and in accordance with its readings consumption of the stabiliser is changed. Before filling the reactor with the emulsion is finished, its heating to a temperature, which does not exceed 65°C, is started to reduce the time of reaching the forpolymerisation temperature. After filling the reactor with the emulsion, its temperature is increased to 75°-80° and forpolymerisation is performed with simultaneous soft mixing until the gelation point is reached. After that, without switching off the mixer, the stabiliser circulation is stopped, after the drops accumulate in the upper part of the reactor, an excess of the stabiliser is discharged, after which the drops, which have reached a resilient condition are transferred into a polymeriser to complete the process of obtaining granules of an equal size.

EFFECT: creation of the forpolymerisation method.

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