Method for the production of highly reactive polyisobutenes

Details Method for the production of highly reactive polyisobutenes Method for the production of highly reactive polyisobutenes

C - Chemistry, Metallurgy

08

F

C08F 110/10 (2006.01) C08F 4/14 (2006.01) C08F 10/10 (2006.01)

Patent

CA 2389252

The invention relates to a method for the continuous production of polyisobutenes by cationic polymerization of isobutenes and/or isobutene- containing hydrocarbons in the liquid phase in the presence of a complex of BF3 and at least one cocatalyst preferably selected from oxygen-containing compounds, whereby the BF3/cocatalyst complex is generated in situ in reaction stream by addition of BF3 and a cocatalyst. The invention is characterized in that BF3 and said oxygen-containing cocatalyst are added to the reaction stream via a common two-material nozzle with an outlet for BF3 and an outlet for said oxygen-containing cocatalyst. The invention also relates to a two- material nozzle with a centrally located outlet for the catalyst.

L'invention concerne un procédé pour produire en continu du polyisobutène par polymérisation cationique d'isobutène et/ou d'hydrocarbures contenant de l'isobutène, en phase liquide, en présence d'un complexe constitué de BF¿3? et d'au moins un cocatalyseur sélectionné de préférence parmi des composés renfermant de l'oxygène. Le complexe BF¿3?/cocatalyseur est produit in situ par addition de BF¿3? et du cocatalyseur dans un flux réactionnel. L'invention est caractérisée en ce que l'addition de BF¿3? et du cocatalyseur dans le flux réactionnel s'effectue par l'intermédiaire d'une buse à deux composants commune, comportant une sortie pour le BF¿3? et une sortie pour le cocatalyseur renfermant de l'oxygène. L'invention concerne également une buse à deux composants comportant une sortie centrale pour le catalyseur.

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