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US 9,802,874 B2Granted
Ethylene tetramerization catalyst systems and method for preparing 1-octene using the same
AssigneesSK Innovation Co., Ltd., SK Global Chemical Co., Ltd.
InventorsTaek Kyu Han, Myung Ahn Ok, Sung Seok Chae, Sang Ook Kang, Jae Ho Jung
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Abstract
Disclosed herein is a method of preparing 1-octene at high activity and high selectivity while stably maintaining reaction activity by tetramerizing ethylene using a chromium-based catalyst system comprising a transition metal or a transition metal precursor, a cocatalyst, and a P—C—C—P backbone structure ligand represented by (R1)(R2)P—(R5)CHCH(R6)—P(R3)(R4).
Claims11
A method of preparing 1-octene by tetramizing ethylene using the following catalyst system consisting essentially of :
- chromium or chromium compound,
- an alkylaluminoxane cocatalyst, and
- a P—C—C—P backbone structure ligand represented by Formula 1 below:
- wherein R1, R2, R3 and R4 are each independently a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group and a substituted heterohydrocarbyl group, and each of the R1, R2, R3 and R4 has no substituent on atoms adjacent to the atoms bonded with P atoms.
1 more element
Dependencies are inferred from the claim text.