Ethylene oligomerization catalyst systems having enhanced...

Details Ethylene oligomerization catalyst systems having enhanced... Ethylene oligomerization catalyst systems having enhanced...

C - Chemistry, Metallurgy

08

F

C08F 4/69 (2006.01)

Patent

CA 2694065

Disclosed herein is a catalyst system for selective oligomerization of ethylene, which comprises a P-C-C-P frame-work ligand, which is (R1)(R2)P-(R5)CHCH(R6)-P(R3)(R4), and a chromium- based metal compound. Also disclosed is a method of greatly enhancing the activity and selectivity of oligomerization, such as trimerization or tetramerization, using a ligand having a specific steric arrangement structure.

L'invention concerne un système de catalyseur pour l'oligomérisation sélective d'éthylène, qui comporte un ligand de structure P-C-C-P, qui est (R1)(R2)P-(R5)CHCH(R6)-P(R3)(R4), et un composé métallique à base de chrome. Un procédé améliorant considérablement l'activité et la sélectivité d'une oligomérisation, telle une trimérisation ou une tétramérisation, en utilisant un ligand ayant une structure d'arrangement stérique spécifique, est également décrit.

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