METHOD OF CONTROLLING CONTINUOUS BUTADIENE-STYRENE SOLUTION COPOLYMERIZATION PROCESS Russian patent published in 1997 - IPC

FIELD: synthetic rubber production. SUBSTANCE: invention consists in stabilizing temperature in the first reactor taking into account change in blend consumption and temperature by way of affecting flow and temperature of heat carrier in solvent-heating heat exchanger and feeding no cooling agent into the first reactor jacket. Heat carrier flow is reduced by the value depending on second derivative of temperature function. When reactor temperature change value is larger than preset positive value and, on the contrary, when temperature change rate is less than preset negative value, heat carrier flow is raised by indicated way and temperature of heat carrier is decreased or increased. When reaction temperature approaches its upper or lower limits, temperature of heat carrier is decreased or increased, respectively. Temperature in the second reactor is controlled by changing cooling agent flow into reactor jacket or introducing solvent into this reactor at temperature exceeding permissible one or by maximizing cooling agent flow. Solvent feed into the second reactor remains on the achieved level when temperature is decreased below its permissible limit. Viscosity after the second reactor is controlled by feeding catalyst into the first reactor, its rate being corrected depending on varying monomer conversion in the first reactor. EFFECT: optimized process parameters. 1 dwg