OLIGOMERISATION OF ALPHA-OLEFINS USING METALLOCENE-TSK CATALYST SYSTEMS AND USE OF OBTAINED POLY-ALPHA-OLEFINS TO PRODUCE LUBRICATING MIXTURES Russian patent published in 2014 - IPC C08F10/14 C10G50/02 C10M107/10 C07C2/14 

FIELD: chemistry.

SUBSTANCE: oligomerisation method includes: a) bringing a C₄-C₂₀ alpha-olefin monomer into contact with a catalyst system containing: 1) metallocene, 2) a first activator containing a solid oxide which is chemically treated with an electron-accepting anion; and 3) a second activator containing an organoaluminium compound of formula Al(X¹⁰)_n(X¹¹)_3-n, where X¹⁰ is independently C₁-C₂₀ hydrocarbyl, X¹¹ is independently a halide, hydride or C₁-C₂₀ hydrocarboxide, and n is a number from 1 to 3; and b) forming an oligomer product in oligomerisation conditions. The method of producing poly-alpha-olefin includes: a) carrying out the oligomerisation method given above to form (b) an oligomer product containing dimers, trimers and higher oligomers in oligomerisation conditions; c) separating the product stream containing the oligomer product from the oligomerisation reactor to obtain a heavy oligomer product. At least a portion of the alpha-olefin monomer, dimers or trimers is removed from the product stream from the oligomerisation reactor to obtain a heavy oligomer product; and d) hydrogenating the heavy oligomer product to obtain poly-alpha-olefin.

EFFECT: alpha-olefin oligomers and poly-alpha-olefins obtained using said catalyst systems can have a high viscosity index, coupled with a low temperature, which makes them especially suitable for use in lubricant compositions and as viscosity regulators.

44 cl, 11 dwg, 18 tbl, 17 ex