Lg Chem, Ltd

Joon-Ho Shin

Sung-Kyu Lee

Tae-Woo Kim

Jong-Ku Lee

Yeon-Uk Choo

Sung-Kyun Kim

Tae-Ho Kim

Dong-Kyu Kim

Kwang-Wook Choi

Jeong-Ho Kim

Eun-Jung Joo

Dae-Young Shin

Jeong-Seok Lee

Chul-Hwan Choi

Ha-Na Lee

Sang-Beom Lee

In-Yong Jeong

Jong-Hui Park

Myeong-Yeon Keum

Sa-Eun Park

The present invention relates to a high-vacuum serial condenser system that can minimize a pressure drop of fluid in condensers by disposing straight pipes between the condensers and installing baffles at predetermined angles in the condensers.

High-vacuum serial condenser system

Disclosed is a method for purifying phenol, by which the loss of a heat source is minimized, the amount used of steam is decreased, and efficiency of energy consumed in a process may be maximized. The method for purifying phenol includes a step of passing impurities including phenol, acetone and hydrocarbon, which are prepared using cumene as a raw material, via a plurality of distillation columns one by one, and performing azeotropic distillation, wherein the ratio of phenol and water at the uppermost end of the distillation column where the azeotropic distillation is performed, is from 60:40 to 65:35, for the optimized separation of the hydrocarbon.

Method for purifying phenol

Disclosed is a method for recovering phenol and acetone from the cracking reaction product of bisphenol-A residue, by which economic feasibility and efficiency may be improved by utilizing a phenol/acetone purification process used for preparing bisphenol-A.

Method for recovering phenol and acetone from cracking reaction product of bisphenol-A residue

Provided is a method for preparing ethylene with improved energy efficiency which can reduce energy due to direct heat exchange between processes.

Method for preparing ethylene with improved energy efficiency

The present invention relates to a dividing wall distillation column for producing high-purity n-butanol, and a method for the production of high-purity n-butanol by fractional distillation. More particularly, the present invention relates to a method which provides a dividing wall distillation column with crude n-butanol as a feed to perform a fractional distillation of n-butanol, and an apparatus thereof. The dividing wall distillation column of the present invention exhibits the effects of a two distillation column from only one distillation column, thereby reducing energy and the costs of installing the apparatus as compared to conventional distillation systems.

Divided wall distillation column for producing high purity normal butanol, and normal butanol distillation method

A dividing wall distillation column for producing high-purity n-butanol and a method for the production of high-purity n-butanol by fractional distillation are disclosed. More particularly, the method which provides a dividing wall distillation column with crude n-butanol as a feed to perform a fractional distillation of n-butanol and an apparatus thereof are disclosed. The dividing wall distillation column exhibits the effects of a two distillation column from only one distillation column, thereby reducing energy and the costs of installing the apparatus as compared to conventional distillation systems.

There is provided a method for a purification of trichlorosilane, the method including: performing a pretreatment for separating a chlorosilane mixture from reaction products of a trichlorosilane production reaction; performing a first purification for separating the chlorosilane mixture into a first top stream and a first bottom stream; performing a second purification for separating the first top stream into a second top stream and a second bottom stream; and performing a third purification for separating the second bottom stream into a third top stream and a third bottom stream, wherein the performing of the third purification is carried out under pressure conditions higher than those of the performing of the second purification, and a heat exchange is generated between the second bottom stream and the third top stream.

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Daejeon, South Korea

Joon-Ho Shin