METHOD AND DEVICE FOR CONTINUOUS SOLUTION COPOLYMERIZATION Russian patent published in 2001 - IPC

FIELD: polymer production. SUBSTANCE: invention, in particular, relates to production of ethylene/propylene and ethylene/propylene/diene copolymers. Monomers, hydrogen, and catalytic complex components are dissolved in hydrocarbon solvent. Gas-liquid mixture containing monomers, solvent, and hydrogen is fed into lower part of the first reactor. Solution of catalytic complex components is separately supplied into reactor. Reaction mixture is subjected to copolymerization at stirring and elevated pressure and temperature. Copolymer solution is directed into the second reactor to be blended and stabilized, after which copolymer solution is washed with an aqueous medium (namely water, water steam, aqueous solution with acidic pH) to remove catalytic complex products and isolate polymer crumb from solution. Washing is carried out by turbulent mixing of polymer solution with aqueous medium in tubular mixer to form flow moving with velocity at least 1.5+/-0.7 m/s. Mixer comprises section of convergent tubes and section of diffusers are rigidly joined with each other. Axis of copolymer solution-supply pipe coincides with tubular mixer axis. Axis of aqueous medium-supply pipe is oriented at an angle to axis of diffuser of the second section of tubular mixer. Extremity of aqueous medium- supply pipe coincides with tubular mixer axis and is disposed at distance from the center of the second-section convergent tube representing at least 1/6 section length. EFFECT: reduced concentration of catalytic complex fragments in copolymer. 2 cl, 2 dwg, 5 ex