SUPPORTED ETHYLENE (CO) Russian patent published in 2005 - IPC

FIELD: polymerization catalysts and polymerization processes.

SUBSTANCE: high-activity ethylene (co)polymerization-appropriate supported titanium-based catalyst is composed of (A) supported catalytic component, notably titanium-containing active component on porous silica, containing at least one titanium compound, at least one magnesium compound, at least one alkylaluminum compound, at least one halide promoter, at least one electron-donor compound, and inert porous silica carrier, wherein halide promoter belongs to the class of compounds described by general formula F-R¹[R² _bX_(3-b)], in which F represents oxygen-containing functional group reactive to organoaluminum compound, titanium compound, and hydroxyl groups; R¹ bivalent C₁-C₆-aliphatic or aromatic grouplinked to functional group F; R² hydrogen atom, unsubstituted or halogen-substituted C₁-C₆-alkyl, halogen-substituted C₃-C₆-cycloalkyl, or halogen-substituted C₆-C₁₀-aryl; b=0,1 or 2; and X represents fluorine, chlorine, or bromine atom; and (B) alkylaluminum cocatalyst. Invention also discloses catalyst preparation method and ethylene (co)polymerization process in presence of above-defined catalyst.

EFFECT: enabled preparation of catalyst with good morphology and flowability of particles, high catalytic activity, good sensitivity to addition of hydrogen, and ability to include comonomer; improved particle morphology of polymers.

15 cl, 2 tbl, 11 ex