METHOD FOR OLEFIN POLYMERIZATION, USING ANTISTATIC AGENT FOR OLEFIN POLYMERIZATION, IN PRESENCE OF METALLOCENE CATALYST Russian patent published in 2023 - IPC C08F2/44 C08F4/659 C08F110/00 C08F210/00 B01J8/00 B01J8/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for olefin polymerization, using an antistatic agent for olefin polymerization, in the presence of a metallocene catalyst. The method for olefin polymerization includes: formation of a mixture, in which the antistatic agent is diglycerol oleate mixed with low-molecular hydrocarbon, supply of the mixture containing the antistatic agent and a catalyst composition based on the metallocene catalyst and aluminoxane to two polymerization reactors, polymerization of one or more alpha-olefins in the presence of the mixture, while a concentration of the antistatic agent in a polymer product is from 1 to 2000 ppm. When implementing the method, the polymerization reactor includes a pre-polymerization loop reactor for pre-polymerization of ethylene with one or more alpha-olefins in the presence of the mixture containing the antistatic agent and the catalyst composition, as well as a reactor with a fluidized layer, sequentially connected to the pre-polymerization loop reactor, in which prepolymer is polymerized to obtain olefin polymer. At the same time, the mixture containing the antistatic agent is supplied to the pre-polymerization loop reactor, the reactor with the fluidized layer, and a pipeline connecting the pre-polymerization loop reactor and the reactor with the fluidized layer.

EFFECT: provision of a possibility of continuous reactor operation during a long time, when implementing a polymerization method, prevention of stratification and formation of streaks, and prevention of formation of several layers of polymer on reactor walls.

10 cl, 3 dwg, 2 tbl, 6 ex