CATALYST COMPOSITION AND PROCESS FOR OLIGOMERIZATION OF ETHYLENE Russian patent published in 2018 - IPC B01J31/18 B01J31/00 B01J31/14 C07C2/36 

FIELD: chemistry.

SUBSTANCE: invention discloses a catalyst composition for ethylene tri- and/or tetramerization, which comprises (a) a chromium compound; (b) a ligand of the general structure: (A) R₁R₂P-N(R₃)-P(R₄)-NR₅R₆ or (B) R₁R₂P-N(R₃)-P(XR₇)R₈ or R₁R₂P-N(R₃)-P(XR₇)₂, where X=O or S, and R₁, R₂, R₃, R₄, R₅, R₆, R₇ and R₈ are independently C₁-C₁₀-alkyl, C₆-C₂₀aryl, C₃-C₁₀-cycloalkyl, aralkyl, alkylaryl or trialkylsilyl; and (c) an activator or co-catalyst, wherein ligand of structure (B) is Ph₂P-N(i-Pr)-P(Ph)S(i-Pr), Ph₂P-N(i-Pr)-P(Ph)OC₂H₅, Ph₂P-N(i-Pr)P(Ph)OCH₃ or a combination comprising at least one of the above. Also disclosed is a catalyst composition for ethylene tri- and/or tetramerization and ethylene tri- and/or tetramerization.

EFFECT: technical result consists in the preparation of 1-octene with high selectivity.

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