METHOD FOR SYSNTHESIS OF LINEAR OLIGOMERS OF α-OLEFINS Russian patent published in 2011 - IPC C07C2/08 C08F2/01 C08F2/06 B01J19/24 

FIELD: chemistry.

SUBSTANCE: cascade of four bubbling reactors joined in series is made. A solvent, homogeneous catalyst, ethylene and a homogeneous cocatalyst are fed into the first reactor. An oligomerisation reaction takes place in the first reactor. Contents of the first reactor are moved into the second reactor of the cascade through a first system of pipes in which there is already ethylene and/or into which ethylene is simultaneously or successively added. An oligomerisation reaction takes place in the second reactor. Contents of the second reactor are moved into another second, series-connected reactor through a second system of pipes in which there is already ethylene and/or into which ethylene is simultaneously or successively added. Contents of the other second reactor are moved into the third reactor through a third system of pipes in which there is already ethylene and/or into which ethylene is simultaneously or successively added. An oligomerisation reaction takes place in the third reactor and linear oligomers of α-olefins are removed from the third reactor. The catalyst and cocatalyst are added not only into the first reactor but in one of the series-connected reactors of the cascade as well. Concentration of the catalyst and cocatalyst is controlled such that the highest concentration of the catalyst is in the first reactor, while that of the cocatalyst is in the last reactor.

EFFECT: invention enables to obtain oligomer without contamination with polymer or branched by-products.

10 cl, 1 dwg