CATALYST SYSTEMS FOR TETRAMERISATION OF ETHYLENE AND METHOD OF PRODUCING 1-OCTENE USING SAID CATALYST SYSTEMS Russian patent published in 2012 - IPC B01J31/34 C07C2/36 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of maintaining stable catalytic activity during tetramerisation of ethylene and a method of producing 1-octene via tetramerisation of ethylene. Tetramerisation is carried out in the presence of a catalyst system containing chromium or a chromium precursor, alkylaluminoxane and a ligand with the backbone structure P-C-C-P, of formula 1, where R¹, R², R³ and R⁴ each independently denotes phenyl or substituted phenyl and R¹, R², R³ and R⁴ each does not have substitutes on atoms neighbouring atoms bonded with P atoms, and R⁵, R⁶ denote a methyl group.

EFFECT: disclosed methods enable stable sustenance of catalytic activity compared to ordinary catalyst systems.

2 cl, 2 dwg, 2 tbl, 17 ex