Lg Chem, Ltd

Jong Ku Lee

Joon Ho Shin

Sung Kyu Lee

Sung Kyun Kim

Jeong Seok Lee

Mi Kyung Kim

Dae Hyeon Kim

Dong Kwon Lee

Hoi In Jeong

Je Kyun Lee

Eun Jung Joo

Jun Seok Ko

Ye Hon Kim

Dae Young Shin

Chang Hoe Heo

Woo Sung Hwang

Jae Ik Lee

Soo Hwan Hwang

Jong Suh Park

Jae Hyun Lee

Tae Woo Kim

Sang Beom Lee

Sung Ho Lee

Se Ho Park

Moon Kyoon Chun

The system for preparing silica aerogel according to the present invention comprises a raw material supply part transferring at least one raw material of de-ionized water, water glass, a surface modifier, an inorganic acid, and an organic solvent to a mixing part, the mixing part mixing the raw materials transferred from the raw material supply part to produce silica wet gel, a drying part drying the silica wet gel to produce the silica aerogel, a recovery part recovering a portion of the vaporized raw material of the raw materials used in at least one of the mixing part and the drying part, and a heat transfer part transferring heat to at least one of the mixing part and the drying part, wherein the system further comprises a pulverizing part that pulverizes the raw material from the row material supply part to the mixing part.

System and rotating blade unit for preparing silica aerogel

Provided are a divided wall distillation column and a separating method. According to the divided wall distillation column and the separating method, when a mixture having three or more components is separated, a material to be separated, for example, 2-ethyl hexyl acrylate can be separated with high purity, and energy reduction in a separation and refinement process of 2-ethyl hexyl acrylate can be promoted.

Divided wall distillation column

The present invention relates to a separation method and a separation process system for easily recovering ethanol from an ethanol oligomerization reactant containing unreacted ethanol. A separation method according to the present invention may improve the economics and increase separation efficiency by easily refluxing ethylene while reducing or excluding the use of a reflux system which uses an expensive cooling medium, and the like, and may also improve process efficiency by reducing the amount of heat used by a reboiler.

Separation method and separation process system for recovering ethylene

The system for preparing silica aerogel comprises a raw material supply part transferring at least one raw material of de-ionized water, water glass, a surface modifier, an inorganic acid, and an organic solvent to a mixing part, the mixing part mixing the raw materials transferred from the raw material supply part to produce silica wet gel, a separating part separating at least one raw material of the raw materials from the mixture containing the silica wet gel transferred from the mixing part, a drying part drying the silica wet gel transferred from the separating part to produce the silica aerogel, a recovery part recovering a portion of the vaporized raw material of the raw materials used in at least one of the mixing part and the drying part, and a heat transfer part transferring heat to at least one of the mixing part and the drying part.

System for preparing silica aerogel

The present invention relates to a separation method and a separation process system for easily recovering ethanol from an ethanol oligomerization reactant containing unreacted ethanol. A separation method according to the present invention may easily reflux ethylene while reducing or excluding the use of a reflux system which uses an expensive cooling medium, and the like, and thus may improve the economics while increasing separation efficiency.

Provided are a separation system for easily recovering normal butene from an olefin fraction including isobutene, isobutane, 1-butene, 2-butene, and normal butane, and a separation process system using the method. Since the separation system may easily convert 1-butene included in the olefin fraction to 2-butene, normal butene may be effectively separated and recovered by factional distillation and each recovered fraction may be easily refluxed even if the use of a reflux system using a refrigerant is reduced or excluded. Thus, economic efficiency may be improved and simultaneously, separation efficiency may be increased.

Method of separating normal butene using isomerization and process system for separating normal butene

Provided is a method of preparing polybutadiene which may improve productivity by minimizing a plugging phenomenon during the preparation of polybutadiene and increasing a conversion rate.

Method of preparing polybutadiene

Provided is an apparatus for preparing polybutadiene which may improve productivity by minimizing a plugging phenomenon during the preparation of polybutadiene and increasing a conversion rate.

Apparatus for preparing polybutadiene

Provided are a separation method for easily recovering normal butene from an olefin fraction including isobutene, isobutane, 1-butene, 2-butene, and normal butane, and a separation process system using the method. Since the separation method according to the present invention may easily convert 1-butene included in the olefin fraction to 2-butene, normal butene may be effectively separated and recovered by factional distillation and each recovered fraction may be easily refluxed even if the use of a reflux system using a refrigerant is reduced or excluded. Thus, economic efficiency may be improved and simultaneously, separation efficiency may be increased.

The present application relates to a device and a method for preparing alkanol. According to the present application, energy can be reduced when preparing alkanol by reducing the amount of steam used in a reboiler or cooling water used in a condenser, and steam generated from a heat exchanger for overhead stream can be utilized in a variety of fields. Also, highly pure alkanol can be prepared according to the present application.

Device for preparing n-butanol

The present application relates to a device and a method for preparing alkanol. According to the present application, energy can be reduced when preparing alkanol by reducing the amount of steam used in a reboiler or cooling water used in a condenser and a cooler, and steam generated from a heat exchanger for column top stream can be utilized in a variety of fields. Also, highly pure alkanol can be prepared according to the present application.

Device for preparing alkanol

The present application relates to a membrane separation device. According to the separation device of the present application, components to be separated using a separation membrane having a small area size can be separated with high selectivity and consequently processing efficiency and economical efficiency can be superbly improved; and according to a method for producing an expanded polystyrene which includes the membrane separation device, components to be separated using a separation membrane having a small area size, in particular, a volatile organic compound (VOC), can be separated with high selectivity and consequently processing efficiency and economical efficiency can be superbly improved, and also, by separating and recovering VOC, an effect in preventing environmental pollution caused by global warming is exhibited.

Membrane separation device

Provided is a method for recycling energy in process of butadiene preparation, which includes, in the process of preparing butadiene using oxidative dehydrogenation reaction, steps of: a) supplying part or all of a light gas discharged from a solvent absorption tower to a turbine to produce electricity; b) passing the light gas passed through the turbine through one or more device units provided with a heat exchanger; and c) feeding the light gas passed through the device units provided with the heat exchanger into a reactor, according to which more economical butadiene preparation process is provided, by reducing net energy value required in process of butadiene preparation using oxidative dehydrogenation reaction.

Method of recycling energy in process of butadiene preparation

The present application relates to a distillation apparatus and a separation method, and according to the distillation apparatus and the separation method of the present application, it is possible to separate a material to be separated during the separation of a mixture of three or more components, for example, 2-ethylhexyl acrylate with high purity, and to achieve an object of saving energy during the separation and purification process of 2-ethylhexyl acrylate.

Distillation apparatus

The present invention relates to a method of recovering an absorption solvent in a butadiene production process through oxidative dehydrogenation, the method including: a) transferring a light gas discharged from an upper portion of an absorption tower to a wash column; and b) recovering the absorption solvent included in the light gas by a solvent circulating in the wash column. Since an absorption solvent may be prevented from being introduced into a reactor, or being discharged to an outside of a system, economic efficiency of a butadiene production process is improved.

Growing community of inventors

Daejeon, South Korea

Jong Ku Lee