METHOD FOR PRODUCING CATALYST FOR OLIGOMERISATION OF ETHYLENE AND OLIGOMERISATION THEREOF Russian patent published in 2021 - IPC B01J31/18 B01J31/38 B01J31/14 C07C2/08 B01J37/04 C08F10/02 

FIELD: chemistry.

SUBSTANCE: present invention relates to a catalytic composition applicable as a catalytic system for oligomerisation of ethylene, providing high activity and production of a linear oligomeric product with a broad weight percentage distribution, that is, from C₄ to C₁₆. Described is a catalytic composition applicable as a catalytic system for oligomerisation of ethylene, wherein said catalytic composition comprises a zirconium amide compound with the general formula wherein X constitutes a halogen atom, preferably chlorine; m constitutes an integer with a value of 4; n constitutes a number equal to 2; R, R' and constitute a saturated or unsaturated aliphatic C₁-C₁₀ hydrocarbon; an organoaluminium compound and an additive, wherein the organoaluminium compound is selected from alkylaluminium, trialkenylaluminium, dialkylaluminium halide, alkylaluminium sesquihalide, dialkylaluminium hydride, alumoxane, dialkylaluminium alkoxide and mixtures thereof, wherein: (i) alkylaluminium constitutes a trialkylaluminium halide selected from triethylaluminium chloride; (ii) trialkenylaluminium constitutes triisoprenylaluminium; (iii) dialkylaluminium halide is selected from diethylaluminium chloride; (iv) alkylaluminium sesquigalide is selected from ethylaluminium sesquichloride; (v) dialkylaluminium hydride is selected from dibutylaluminium hydride; (vi) alumoxane is selected from methylalumoxane; and (vii) dialkylaluminium alkoxide constitutes diethylaluminium ethoxide; wherein the additive is selected from a group consisting of an ether, an ester, an amine, an anhydride and a sulphur compound; or, preferably, wherein the additive is selected from ethyl acetate, ethyl acetoacetate, ethyl benzoate, anisole, tetrahydrofurane, 1,2-dioxane, isobutylamine, acetic anhydride, thiophene and mixtures thereof.

EFFECT: creation of a catalytic composition applicable as a catalytic system for oligomerisation of ethylene, capable of ensuring production of highly pure linear alpha-olefins.

11 cl, 5 tbl