Lg Chem, Ltd

Dae Chul Kim

Dong Hyun Ko

Hyun Kil Nam

Kyong Yong Cha

Dae Heung Choi

Myung Ji Suh

Jun Han Kang

Moo Ho Hong

Jun Kyu Han

Ye Seul Hwang

Sang Jin Han

Sung Shik Eom

Joo Hyuck Lee

Myung Han Lee

Sung Hyun Park

Dong-Hyun Ko

O Hak Kwon

Min Han Kwak

Jung Woo Kim

Kyu Young Kim

Jeongyong Lee

Sung Moon Choi

Jae Hui Choi

Hyung Min Ahn

Moo Song Seo

Sung June Cho

O Hark Kwon

Hyungmin Ahn

Jeongnam Kim

The present disclosure provides a thermoplastic copolymer composition capable of improving low noise properties without deterioration in mechanical properties, which is used in manufacture of a molded article, such as a constant velocity joint boot used as a component of an automobile. The composition includes a polyester elastomer; additives including silica and a siloxane-based polymer represented by Chemical Formula 1; and polytetramethylene glycol, where the additives are included in an amount of 1 to 4 parts by weight based on 100 parts by weight of the polyester elastomer

Thermoplastic copolymer composition and molded article manufactured using the same

A method of preparing a poly(ether ester) copolymer is provided, and more particularly, a method of preparing a poly(ether ester) copolymer having a high content of a polyether and high viscosity by using a dicarboxylic acid as a starting material is provided. According to the present invention, a dicarboxylic acid of which production cost is low is used as a starting material to prepare a poly(ether ester) copolymer having a high content of polyether and having a high viscosity without solid-phase polymerization.

Method of preparing poly(ether ester) copolymer

The present invention relates to a bismuth molybdate-based composite oxide catalyst having a microporous zeolite coating layer on the surface thereof and thus having high selectivity for 1,3-butadiene, a method of preparing the same, and a method of preparing 1,3-butadiene using the same. The catalyst has a microporous zeolite coating layer, and thus enables only gaseous products (light) to selectively pass through the zeolite coating layer, improving selectivity for 1,3-butadiene.

Bismuth molybdate-based catalyst having zeolite coating layer, method of preparing the same, and method of preparing 1,3-butadiene using the same

Disclosed are a mesoporous composite oxide catalyst, a method for preparing the same and a method for synthesizing 1,3-butadidne using the same. The surface area is increased by introducing certain porous silica into preparation of a catalyst for synthesizing 1,3-butadiene, thereby improving a conversion ratio of normal-butene, and selectivity and yield of 1,3-butadiene, and providing economic efficiency from the viewpoint of decreasing an amount of used metal and reducing catalyst production cost.

Mesoporous composite oxide catalyst, method for preparing the same and method for synthesizing 1,3-butadiene using the same

Disclosed is a multi-component bismuth molybdate catalyst for production of butadiene which comprises bismuth, molybdenum and at least one metal having a monovalent, divalent or trivalent cation, and further comprises cesium and potassium and thus has advantages of improving conversion ratio, yield and selectivity of butadiene and of providing stability of process operation.

Oxidation catalyst for production of butadiene and method of preparing the same

Disclosed are a catalyst composition for oxidative dehydrogenation and a method of preparing the same. More particularly, disclosed is a catalyst composition comprising a multi-ingredient-based metal oxide catalyst and a mixed metal hydroxide. The catalyst composition and the method of preparing the same according to the present disclosure may prevent loss occurring in a filling process due to superior mechanical durability and wear according to long-term use, may inhibit polymer formation and carbon deposition during reaction, and may provide a superior conversion rate and superior selectivity.

Catalyst composition and method for preparing same

Disclosed is a method for regenerating a hydrogenation catalyst. More specifically, disclosed is a method for regenerating a hydrogenation catalyst poisoned during hydrogenation of a hydroformylation product for preparation of alcohol by stopping hydrogenation in a hydrogenation stationary phase reactor in which the hydrogenation catalyst is set and flowing hydrogen gas under a high temperature normal pressure. The method has an effect in that the poisoned hydrogenation catalyst can be efficiently recovered through a simple process.

Method for regenerating hydrogenation catalyst

The present invention relates to a catalyst composition for hydroformylation and a method for preparing aldehydes using the same, wherein the catalyst composition for hydroformylation comprises: a triaryl phosphine ligand; a phosphine oxide or phosphine sulfide ligand having a specific chemical formula; and a transition metal catalyst. The catalyst composition provides high catalyst activity and stability and selectivity to normal aldehydes when used in the hydroformylation for preparing aldehydes from olefins.

Catalyst composition for hydroformylation and method for producing aldehyde using the same

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Daejeon, South Korea

Dae Chul Kim