Inha-industry Partnership Institute

S-oil Corporation

Rstech Corporation

Geon Joong Kim

Ho Seong Lee

Seong Jin Kim

Jin Won Yun

Chan-Ju Song

Tae Young Jang

Tae-Yun Kim

Young Soo Ahn

Sung Hyeon Baeck

Sang-Cheol Paik

Dong-Kyun Noh

Ho Cheol Kim

Disclosed is a method for selective dealkylation of alkyl-substituted C+ aromatic compounds using a bimodal porous dealkylation catalyst at a low temperature. The catalyst has a bimodal porous structure including both mesopores and micropores. The catalyst includes a crystalline aluminosilicate and a metal. The catalyst is highly active at a low temperature. According to the method, C+ aromatic compounds substituted with at least one C+ alkyl group as by-products formed by xylene production can be selectively dealkylated and converted to BTX, etc. on a large scale within a short time. In addition, the method is an environmentally friendly process entailing reduced waste treatment cost when compared to conventional mesitylene production methods. Therefore, high value-added mesitylene can be separated from low value-added C+ aromatic compounds at lower cost compared to conventional methods. Furthermore, the supported metal catalyst is easy to recover after dealkylation and is recyclable, thereby contributing to reduced cost.

Method for selective dealkylation of alkyl-substituted C9+ aromatic compounds using bimodal porous dealkylation catalyst at low temperature

The present invention relates to new chiral salen catalysts and methods for the preparation of chiral compounds from racemic epoxides by using new catalyst. More particularly, the present invention is to provide novel chiral salen catalysts and their uses for producing chiral compounds having high optical purity to be used as raw materials for preparing chiral medicines or food additives in a large scale economically, wherein the chirl salen catalyst having a particular molecules structure can be reused continuously without any activating process of used catalysts and cause no or little racemization after the reaction is completed because it maintains its catalytic activity after the reaction process.

Chiral salen catalyst and methods for the preparation of chiral compounds from racemic epoxides by using new catalyst

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Seoul, South Korea

Geon Joong Kim