METHOD OF INCREASING EFFICIENCY OF CONTROLLING BUTYL RUBBER PRODUCTION PROCESS Russian patent published in 2015 - IPC C08F210/12 G05D27/00 

FIELD: chemistry.

SUBSTANCE: invention relates to production of synthetic rubber and can be used to control the process of producing butyl rubber. A method of increasing efficiency of controlling the process of producing butyl rubber, obtained via copolymerisation of isoprene and isobutylene dissolved in an inert solvent in the presence of a catalyst, is carried out in an apparatus which includes a mixer, a reactor, connected to each other by pipes using control loops, consisting of controller-sensors for: flow rate of isoprene, isobutylene, conditionally inert and activated solvent, mixture, catalyst; level and flow rate of coolant in the reactor, sensors for the temperature and concentration of the mixture, temperature in the polymeriser, connected to controllers with adjustment of the flow rate of isoprene, isobutylene, conditionally inert solvent, coolant; the method being characterised by that it includes: continuous sampling of the catalyst and the mixture for a test polymerisation reaction in a small flow-type polymeriser, determining the polymerisatioin reaction temperature in the small flow-type polymeriser and sending the measurement results to the catalyst and mixture preparation process control unit, determining physical-mechanical properties of the finished polymer and sending all measurement results to the catalyst and mixture preparation process control unit, performing data analysis in the control unit and, in accordance with a program, the control unit outputs instructions for changing the ratio of components in the catalyst and the mixture, activating in a cavitator before into the main polymeriser part of the solvent - CH₃Cl, used in the catalyst and mixture preparation processes, constantly feeding into the main polymeriser the activated part of the solvent after the cavitator, using a magnetic pulsed apparatus, cyclically applying pulsed mechanical action on pipes of the cooling system and the housing of the polymeriser, which removes the polymer stuck on the outer surface of the pipes and the inner mirror of the polymerisation apparatus in order to maintain a constant heat transfer coefficient of the surface of the pipes of the cooling system and maintain the required temperature of the polymer suspension in the main polymeriser.

EFFECT: automatic control of concentration and activity of the catalyst, longer operating time of polymerisers, high stability of the suspension of butyl rubber in methyl chloride medium, high homogeneity of the end product.

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