Catalyst system used in olefin oligomerization and method for olefin oligomerization
AssigneePublic Joint Stock Company "Sibur Holding"
InventorsDenis Alekseevich Lenev, Rafael Acevedo Forero
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Abstract
The invention relates to the field of oligomerization of olefins to produce linear α-olefins, in particular hexene-1, with the use of a catalyst system. The catalyst system comprises a chromium source compound, a nitrogen-containing ligand, alkylaluminum, and a zinc compound, wherein catalyst system is activated during its preparation by 1) heating some and SHF irradiation (microwave irradiation) of alkylaluminum or a mixture of the alkylaluminum and the zinc compound, or by 2) heating alkylaluminum or a mixture of the alkylaluminum and the zinc compound, followed by holding (aging) the prepared catalyst system for a certain period of time.
Claims28
A method for preparing a catalyst system used in a process of oligomerization of olefins to produce at least 99.9% isomeric purity of hexene-1, which is characterized by comprising mixing a chromium source compound, a nitrogen-containing ligand, alkylaluminum, and a zinc compound, characterized in that the alkylaluminum or a mixture of the alkylaluminum and the zinc compound is activated by heating and SHF irradiation (microwave irradiation) prior to the mixing thereof with the other components of the catalyst system, wherein the heating of the alkylaluminum or the mixture of the alkylaluminum and the zinc compound during the preparation of the catalyst system is carried out up to 66 C.
Dependencies are inferred from the claim text.