Sk Innovation Co., Ltd.

Sk Global Chemical Co., Ltd.

Sabic Sk Nexlene Company Pte. Ltd.

Sk Energy Co., Ltd.

Sung Seok Chae

Myung Ahn Ok

Taek Kyu Han

SAng Hyeon Kang

Jong Sok Hahn

Dae Ho Shin

Choon Sik Shim

Hyeong Taek Ham

Jae Ho Jung

Seung Bum Kwon

Ho Seong Lee

Dong Cheol Shin

Sun Young Kim

Sang Ick Lee

Yonggyu Han

Hyun Wook Jung

Min Seon Jung

Ki Nam Chung

Kyu Cheol Cho

Sung Kwan Kim

Dong Chul Shin

Jong Sok Han

Seung Yeol Han

Se Won Oh

Sang Ook Kang

Kyung Ryang Wee

Tack Kyu Han

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&#x2014;C&#x2014;C&#x2014;P backbone structure ligand represented by (R)(R)P&#x2014;(R)CHCH(R)&#x2014;P(R)(R).

Ethylene tetramerization catalyst system and method for preparing 1-octene using the same

Provided are a novel transition metal compound, a transition metal catalyst composition for preparing an ethylene homopolymer or a copolymer of ethylene and &#x3b1;-olefin, containing the same, a method for preparing an ethylene homopolymer or a copolymer of ethylene and &#x3b1;-olefin using the same, and an ethylene homopolymer or a copolymer of ethylene and &#x3b1;-olefin prepared using the same.

Transition metal compound, transition metal catalyst composition for polymerizing olefin, containing same, and method for preparing ethylene homopolymer or copolymer of ethylene and alpha-olefin by using same

Ethylene tetramerization catalyst systems and method for preparing 1-octene using the same

Provided are a hybrid supported metallocene catalyst, a method for preparing the same, and a process for preparing an olefin polymer using the same, and more particular, a hybrid supported metallocene catalyst characterized in that two kinds of metallocene compounds containing a new cyclopenta[b]fluorenyl transition metal compound are supported on an inorganic or organic porous carrier surface-treated with an ionic compound and a co-catalyst, a method for preparing the same, and a process for preparing an olefin polymer using the hybrid supported metallocene catalyst.

Hybrid supported metallocene catalyst, method for preparing the same, and process for preparing polyolefin using the same

This invention relates to a catalyst system for selective oligomerization of ethylene, which includes (i) a chromium compound; (ii) a ligand having a P&#x2014;C&#x2014;C&#x2014;P backbone structure; and (iii) an activator, thus preparing 1-hexene and/or 1-octene with high activity and selectivity.

Catalyst systems for preparing 1-hexene and/or 1-octene from ethylene

Provided is an ethylene copolymer having improved hygienic property. More particularly, the ethylene copolymer satisfies a correlation between a density thereof and an extract content. The ethylene copolymer having improved hygienic property can be applied in injection molding, rotation molding, or blow molding.

Ethylene copolymer with improved hygienic property and process for preparing the same

Disclosed are an ethylene polymerization process, a catalyst for use in the process, a production method employing the catalyst, and a product produced thereby. More specifically, disclosed is a process of producing an ethylene copolymer from ethylene and an alpha-olefin comonomer, in which the produced ethylene copolymer has a multimodal molecular weight distribution and excellent processability and physical properties, and thus can increase the value and productivity of products, including pipes and films. Particularly, the produced ethylene copolymer has a trimodal or higher molecular weight distribution or density distribution, and thus, when it is a linear low-density copolymer, it has an excellent effect of improving the impact strength of films, and when it is a medium-density ethylene copolymer, it can be produced into pipes, which have slow crack growth rate and can be used even at high temperature.

Ethylene copolymer having multiple pitch in molecular weight distribution and the method of preparing 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

Ethylene copolymer having multiple pitch molecular weight distribution and the method of preparing the same

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Daejeon, South Korea

Sung Seok Chae