Etheyene oligomeriza catalyst systems having enehanced selectivity
AssigneesSK Innovation Co., Ltd., SK Global Chemical Co., Ltd.
InventorsTaek Kyu Han, Sung Seok Chae, San Ook Kang, Kyung Ryang Wee, Sung Kwan Kim
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Abstract
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.
Claims12
A catalyst system for selective oligomerization of ethylene, which comprises a transition metal or transition metal precursor, a promoter and a ligand represented by any one of the following formulas 1 to 4:
- wherein R1, R2, R3 and R4 are each independently hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl, R5 and R6 are each independently hydrocarbyl or substituted hydrocarbyl, and A is hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl.
Dependencies are inferred from the claim text.