CATALYST FOR POLYMERISATION OF OLEFINS AND PREPARATION METHOD THEREOF Russian patent published in 2017 - IPC C08F4/654 C08F110/06 

FIELD: chemistry.

SUBSTANCE: method comprises (a) contacting a dialkyl magnesium compound represented by R'R"Mg, with a magnesium-solubilising compound to form a reaction mixture, wherein each of the elements R' and R" represents a hydrocarbon group havingC₁-C₂₀ carbon atoms, wherein the compound contacting with the magnesium-solubilising dialkyl compound lresults in forming the first reaction mixture containing a magnesium alkoxide in the reaction mixture; (B) adding a titanium compound represented by Ti(OR'")_pX_4-p, where X represents a halogen atom; R'" - a hydrocarbon group, and p - an integer having a value less than or equal to 4, for the conversion of magnesium alkoxide in the reaction mixture to form a second reaction mixture; (c) adding at least one internal electron donor either after stage (a), or after stage (b) with obtaining a catalytic component; and (d) activating the catalytic component by means of a solution containing a titanium compound and an inert solvent, and extracting the solid titanium catalytic component. A solid titanium catalyst component, the catalyst system of the Ziegler-Natta, and a method for polymerization and/or copolymerisation of olefins are proposed as well.

EFFECT: invention simplifies the method for preparing a catalyst system for the polymerisation of olefins The catalyst system exhibits excellent polymerisation activity and stereoregularity.

17 cl, 5 tbl, 15 ex