Methods of preparation of an olefin oligomerization catalyst

B - Operations – Transporting – 01 – J

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B01J 31/04 (2006.01) B01J 31/12 (2006.01) C07C 2/30 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2619226

A method of making an olefin oligomerization catalyst, comprising contacting a chromium-containing compound, a heteroatomic ligand, and a metal alkyl, wherein the chromium-containing compound comprises less than about 5 weight percent chromium oligomers. A method of making an olefin oligomerization catalyst comprising a chromium-containing compound, a nitrogen-containing compound, and a metal alkyl, the method comprising adding a composition comprising the chromium-containing compound to a composition comprising the metal alkyl. A method of making an olefin oligomerization catalyst comprising a chromium-containing compound, a nitrogen-containing compound, and a metal alkyl, the method comprising abating all or a portion of water, acidic protons, or both from a composition comprising the chromium-containing compound, a composition comprising the nitrogen-containing compound, or combinations thereof prior to or during the preparation of the catalyst. Methods of oligome.pi.zmg olefins by contacting such catalysts with an alpha olefin.

La présente invention concerne un procédé de fabrication d'un catalyseur d'oligomérisation d'oléfines, comprenant l'étape consistant à mettre en contact un composé contenant du chrome, un ligand hétéroatomique et un alkyle métallique, ledit composé contenant du chrome comprenant moins d'environ 5 pour cent en poids d'oligomères du chrome ; un procédé de fabrication d'un catalyseur d'oligomérisation d'oléfines comprenant un composé contenant du chrome, un composé contenant de l'azote et un alkyle métallique, ledit procédé comprenant l'étape consistant à ajouter une composition comprenant le composé contenant du chrome à une composition comprenant l'alkyle métallique ; un procédé de fabrication d'un catalyseur d'oligomérisation d'oléfines comprenant un composé contenant du chrome, un composé contenant de l'azote et un alkyle métallique, ledit procédé comprenant l'étape consistant à enlever la totalité ou une partie de l'eau, des protons acides ou des deux d'une composition comprenant le composé contenant du chrome, d'une composition comprenant le composé contenant de l'azote ou d'associations de celles-ci avant ou pendant la préparation du catalyseur ; et des procédés d'oligomérisation d'oléfines consistant à mettre en contact de tels catalyseurs avec une alpha-oléfine.

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