Sk Innovation Co., Ltd.

Sk Global Chemical Co., Ltd.

Sung Kwan Kim

Tae Jin Kim

SAng Hyeon Kang

Ho Seong Lee

Myung Ahn Ok

Jong Sok Hahn

Sung Seok Chae

Dae Ho Shin

Tae Woo Woo

Taek Kyu Han

Kyung Ryang Wee

Sang Ook Kang

Sung Bo Ko

Mal Ou Lee

Disclosed herein is a group IV transition metal catalyst for producing an ethylene homopolymer or an ethylene-olefin copolymers, having high catalytic activity, which includes a cyclopentadiene derivative and one or more anionic ligands having an aryl group substituted with an aryl derivative at an ortho-position thereof around a transition metal, the ligands not being crosslinked to each other, a catalyst system including the group IV transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and a method of producing ethylene homopolymers or ethylene-olefin copolymers using the catalyst system.

Transition metal catalytic systems and methods for preparing ethylene homopolymers or copolymers of ethylene and olefins using the same

Disclosed herein is a catalyst system for selective oligomerization of ethylene, which comprises a P&#x2014;C&#x2014;C&#x2014;P frame-work ligand, which is (R)(R)P&#x2014;(R)CHCH(R)&#x2014;P(R)(R), 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.

Ethylene oligomerization catalyst systems having enhanced selectivity

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Gyeongsangnam-do, South Korea

Sung Kwan Kim