Lg Chem, Ltd

Young Shil Do

Choong Hoon Lee

Seung Hwan Jung

Yoon Hee Cho

Sang Eun Park

Don Ho Kum

Yun Jin Lee

Jin Sam Gong

Hae Woong Park

Ki Soo Lee

Eun Jung Lee

Jeong Heon Ahn

Young Woo Lee

A Rim Kim

Hyun Chul Jung

Hyo Jung Han

Wan Kyu Oh

Sae Hume Park

Ji Joong Moon

Won Seok Kim

Ji Ha Kim

Yu Jin An

Provided is a method of preparing an acrylonitrile dimer, the method including: supplying an acrylonitrile monomer, a phosphorus-based catalyst, an alcohol solvent, and an ionic liquid to a reactor to perform a dimerization reaction to prepare a single-phase dimerization reaction product (S10); supplying a reactor discharge stream including the dimerization reaction product to a first distillation column, separating the alcohol solvent and an unreacted acrylonitrile monomer from an upper discharge stream, and supplying a lower discharge stream including an acrylonitrile dimer, the ionic liquid, and the phosphorus-based catalyst to a second distillation column (S20); and separating an upper discharge stream including the acrylonitrile dimer and separating a lower discharge stream including the ionic liquid and the phosphorus-based catalyst, from the second distillation column (S30).

Method for preparing acrylonitrile dimer

A transition metal compound having a novel structure is disclosed herein. The transition metal compound can have improved structural stability by forming a stable coordination site of a transition metal through controlling a bond angle formed by the amido group of a phenylene bridge, a cyclopentadienyl ring, and a transition metal. The transition metal compound has excellent copolymerization properties and may produce an olefin polymer having a high molecular weight in a ultra low density region.

Transition metal compound, catalyst composition including the same and method for preparing polymer using same

A transition metal compound represented by Chemical Formula 1 and a method for preparing the same, catalyst compositions including the same, and olefin-based polymers prepared from the same are disclosed herein. The transition metal catalyst has excellent structural stability together with excellent catalytic activity and can exhibit excellent copolymerizability even at a high temperature. In an embodiment, an olefin-based polymer prepared using a catalyst composition including the transition metal compound has a density of 0.91 g/cc or less.

Transition metal compound and method for preparing the same

The present invention discloses a transition metal compound including a heteroatom and having a novel structure, a catalyst composition including the same, and a preparation method of a polymer using the catalyst composition. The transition metal compound according to an embodiment of the present invention may be used as a catalyst having good copolymerization properties, and a polymer having a high molecular weight at a low density region may be prepared.

Transition metal compound having heteroatom, catalyst composition including the same and preparation method of polymer using the catalyst composition

This disclosure relates to a catalyst composition that can prepare polyolefin having high molecular weight, a method for preparing the same, and a method for preparing polyolefin using the same. The dinuclear metallocene compound included in the catalyst composition according to the present invention is a dinuclear metallocene compound with a new structure, and, unlike a single-site catalyst, has high accessibility to a substrate, and thus, can provide a multi-site catalyst with high activity.

Catalyst composition, a method for preparing the same, and a method for preparing polyolefin using the same

The present invention relates to a polyolefin having a molecular weight distribution of 1.5 to 3.0 and having a branch gradient number (BGN) of 0.01 to 1.0. According to the present invention, there is provided the polyolefin having a narrow molecular weight distribution and showing a unique comonomer distribution to have excellent impact strength and mechanical physical properties.

Polyolefin

The present invention relates to a catalyst composition and a method of preparing a polymer including the same.

Catalyst composition and method of preparing polymer including the same

The present invention relates to a dinuclear metallocene compound with a new structure which can manufacture polyolefin having high molecular weight and to a method for preparing the same. The dinuclear metallocene compound according to the present invention is a dinuclear metallocene compound with a new structure, and, unlike a single-site catalyst, has high accessibility to a substrate, and thus, can provide a multi-site catalyst with high activity.

Dinuclear metallocene compound, and a method for preparing the same

The present invention discloses a transition metal compound having a novel structure and including a heteroatom, a catalyst composition including the same, and a method for preparing polymers using the same. The transition metal compound according to an embodiment of the present invention has good copolymerization properties, and a polymer having a low density may be prepared using thereof. Thus, a copolymer having various uses may be prepared.

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Daejeon, South Korea

Young Shil Do