CATALYST AND METHOD FOR OLIGOMERISATION OF ALPHA-OLEFINS Russian patent published in 2012 - IPC B01J27/06 B01J21/02 C10G50/00 C10G50/02 C07C2/08 C07C2/22 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst for oligomerisation of alpha-olefins and a method for oligomerisation of alpha-olefins. The catalyst for oligomerisation of alpha-olefins is a two-component system containing aluminium-containing compounds and a chlorine-containing co-catalyst. The aluminium -containing compounds are selected from a group comprising triisobutylaluminium, diisobutylaluminium hydride or products of transalkylation thereof with decene-1 tridecylaluminium or decyldiisobutylaluminium, and are used in amount of 0.62-4.08 mmol per mole of alpha-olefin. The co-catalyst is selected from a group comprising hydrogen chloride or an organic monochloride, e.g., tributyl chloride. The ratio Cl:Al is equal to 2.5:16.2 mol/mol respectively. The method for oligomerisation of alpha-olefins involves preparation of olefin material, a step for oligomerisation, washing and extraction of spent catalyst from the oligomerisation product, followed by separation of the oligomerisation product into fractions and hydrogenation thereof.

EFFECT: controllability of the oligomerisation process by regulating its rate and increase in output of the desirable low-molecular weight fractions of oligomers, avoiding the step for dechlorination and depolymerisation of high-molecular weight products extracted from the oligomerisation product in form of still residues.

3 cl, 4 tbl