OBTAINING THE CATALYZER OF OLIGOMERIZATION OF OLEFINES Russian patent published in 2017 - IPC B01J31/04 B01J31/14 B01J31/18 B01J31/22 C07C2/32 C07F11/00 C07C51/41 

FIELD: chemistry.

SUBSTANCE: catalytic system comprises: a) a composition comprising C₃-C₂₅-chromium (III) carboxylate, b) a pyrrole compound; and c) a hydrocarbyl-metal compound. In this case, component (a): i) is characterized by an infrared spectrum taken with KBr plates, with an absorption peak of infrared radiation υ_asym (CO₂) within 110 cm^-1 from infrared peak υ_sym (CO2) and the ratio of the heights of the absorption peaks of infrared radiation for the absorption peak of infrared radiation υ_asym (CO₂) at 1516+15 cm^-1 and an absorption peak of infrared radiation located at 700±50 cm^-1, greater than or equal to 3:1, or ii) is characterized by an acceptance test value, R², equal to at least 0.6, to compare the data points of the high-energy X-ray analysis g(r) of the composition containing C₃-C₂₅-chromium(III) carboxylate, with the calculated points of the high-energy x-ray diffraction data g (r) for the theoretical model of single-core chromium(III) acetate in the range r from 1.3 to 4 angstroms, or iii) obtained by contacting essentially anhydrous and substantially acid-free conditions 1) a precursor of chromium(III) having the formula CrX₃L_ℓ, wherein each X is independently a halide, each L is independently a C₂-C₁₀ ether, a C₂-C₁₀ thioether, a C₂-C₅ nitrile, a C₁-C₃₀ amine or a C₃-C₃₀ phosphine or any combination thereof and ℓ nap Is in the range from 0 to 7, 2) C₃-C₂₅ carboxylate of the metal of group 1 or 2 groups and 3) of the first solvent.

EFFECT: increase in productivity or decrease in the cost of the catalytic system during the polymerization of olefins.

53 cl, 23 dwg, 12 tbl, 11 ex