METHOD OF PRODUCING ETHYLENE HOMOPOLYMERS OR COPOLYMERS Russian patent published in 2020 - IPC C08F2/01 C08F10/02 B01J19/24 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing homopolymers or copolymers of ethylene. Described is a method of producing homopolymers or copolymers of ethylene in an apparatus comprising a high-pressure tubular reactor and a preheater. Reaction fluid introduced into the reactor is heated at the inlet of the reactor in the preheater, and the average velocity of the reaction fluid in the preheater is lower than the average rate of the reaction fluid in the tubular reactor at the inlet of the reactor. Ratio of average speed of reaction fluid medium in tubular reactor to average speed of reaction fluid medium in preliminary heater ranges from 1.5:1 to 5:1.

EFFECT: obtaining LDPE with higher depth of ethylene conversion per reactor cycle and better optical properties.

14 cl, 1 tbl, 3 ex, 3 dwg