Lg Chem, Ltd

Sung Kyun Kim

Sung Kyu Lee

Joon Ho Shin

Jong Ku Lee

Tae Woo Kim

Ji Hye Kim

Yong Mann Beyun

Yeon Uk Choo

Byung Woo Choi

Sa Eun Park

Saeun Park

A method of preparing isopropyl alcohol, where a propylene monomer and water are reacted in a reactor to produce a reaction product including isopropyl alcohol, and the reaction product stream is separated into unreacted propylene monomer and isopropyl alcohol with high purity using an absorption column, a first gas purification column, a second gas purification column, and an inert gas removal column.

Method for preparing isopropyl alcohol

The present disclosure provides a multi-component mixture separation system including a distillation column including a first section and a second section separated by a partition wall, and a phase separator receiving a lower discharge stream of the second section and separating the stream into an aqueous phase and an oil phase, and refluxing a portion of the separated aqueous phase or oil phase to the first section, in which the first section includes a chimney tray provided on an upper portion, and the first section is fed with a feed stream containing three or more components to separate high-boiling point component to a lower portion, and a gaseous component moves to the second section.

Multi-component mixture separation system

A method for separating and refining 1-butene with a high purity and a high yield from a raffinate-2 stream. The method includes: feeding raffinate-2 to a first distillation column; obtaining heavy raffinate-3 from a lower part of the first distillation column; recovering an upper part fraction containing 1-butene from an upper part of the first distillation column; feeding the upper part fraction containing 1-butene to a second distillation column; recovering a first lower part fraction rich in 1-butene from a lower part of the second distillation column and light raffinate-3 from an upper part of the second distillation column. Heat of the upper part fraction recovered from the upper part of the first distillation column is fed to the lower part of the second distillation column through a first heat exchanger. Thus, 1-butene is obtained with high purity and high yield while maximizing an energy recovery amount by double-effect distillation.

Method of refining raffinate-2

The purification method of isopropyl alcohol including: feeding a feed including isopropyl alcohol, water, and a byproduct comprising normal propyl alcohol to an azeotropic distillation purification tower; separating an azeotrope comprising isopropyl alcohol, normal-propyl alcohol, and water from the top of the azeotropic distillation purification tower and feeding the azeotrope to a dehydration tower; separating the isopropyl alcohol and the normal-propyl alcohol from the bottom of the dehydration tower and feeding the isopropyl alcohol and the normal-propyl alcohol to a normal-propyl alcohol purification tower; and separating the isopropyl alcohol from the top of the normal propyl alcohol purification tower.

Isopropyl alcohol purification method

Provided is a method of separating and purifying a mixture of components having small difference in boiling point, and the method may maximize an energy collecting amount and collect a product to be desired in high purity and high yield.

Method for separating and purifying mixture having small difference in boiling points

Provided is a method of separating and refining 1-butene with a high purity and a high yield from a raffinate-2 stream, and recovering the refined 1-butene while maximizing an energy saving rate by using a high efficiency distillation column installed with a separation wall.

Raffinate-2 refining method

The present application relates to a selective distillation apparatus and a distillation method, which provides a distillation apparatus capable of switching between a serial connection mode and a parallel connection mode on the situation, thereby enabling selective operation of high-efficiency operation and high-capacity operation.

Selective distillation apparatus and distillation method

The present application relates to an apparatus for purifying cumene comprising: a first dividing wall type distillation column which takes in a stream from an alkylation reactor and comprises a first benzene output line and a benzene/cumene/polyisopropylbenzene stream output line; a second dividing wall type distillation column which takes in a stream from a transalkylation reactor and a benzene/cumene/polyisopropylbenzene stream, includes a transalkylation reactor stream input line, a benzene/cumene/polyisopropylbenzene stream input line, a second benzene output line, and a first polyisopropylbenzene stream output line; and a third distillation column which takes in a polyisopropylbenzene stream, includes a second polyisopropylbenzene output line, and a heavies output line.

Apparatus and method for purifying cumene

The present application relates to an apparatus and method for purifying cumene. The apparatus and method for purifying cumene according to the present application can reduce the amount of energy consumption which occurs during purification processes and can provide an apparatus and method capable of efficiently purifying cumene.

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 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 application relates to a distillation device and a distillation method, and according to the distillation device and method of the present application, channeling occurring during the separation of a mixture may be blocked, thereby enhancing the separation efficiency and achieving energy saving.

Distillation device

Trihalosilane refining device having a divided wall distillation column is disclosed. The trihalosilane refining device can be useful in obtaining high-purity trihalosilane from a feed containing a trihalosilane while consuming a small amount of energy.

Trihalosilane refining device having divided wall distillation column

A trihalosilane refining device and a trihalosilane refining method are provided. The trihalosilane refining device can be useful in obtaining high-purity trihalosilane from a feed containing a trihalosilane while consuming a small amount of energy.

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Daejeon, South Korea

Sung Kyun Kim