Lg Chem, Ltd

Lg Life Sciences, Limited

Gyo-Hyun Hwang

Won-Ho Lee

Min-ho Kil

Hyun-Kuk Noh

Jae Sung Lee

Hyun Kil Nam

Hyun-Ik Shin

Jay-Hyok Chang

Yeong-Dae Kim

Kyung Hee Lee

Young-Keun Kim

Min-suk Kim

Hyuk Joo Kim

Won-Jong Kwon

Sung-Ho Yoon

Jung-Won Park

Byung-Yul Choi

Kyung-Hoon Lee

Sang-Uck Lee

Ju-yeon Park

Sung-chul Lim

Young-hyun Choe

Duk-ki Kim

Hyun-jong Shin

Kyung-Hee Lee

Jae-Sung Lee

The present invention relates to a belt-shaped metal nanostructure in which a wide surface area of catalytically active material can be realized even by a relatively small amount thereof so that it shows an excellent catalytic activity, and a method for preparing same.

Belt-shaped metal nanostructure and method for preparing same

The present invention relates to a method of preparing a heteropoly acid catalyst used for the production of methacrylic acid by gas phase oxidation of methacrolein, more precisely a method of preparing a heteropoly acid catalyst comprising the steps of preparing a slurry by adding metal precursors and ammonium salt to protonic acid Keggin-type heteropoly acid aqueous solution and stirring thereof; and drying, molding and firing the slurry to give a catalyst. The present invention provides a method of preparing a heteropoly acid catalyst exhibiting high methacrolein conversion rate and methacrylic acid selectivity without pre-firing process by using high purity protonic acid Keggin-type heteropoly acid and ammonium salt.

Method of preparing heteropoly acid catalyst

The present invention relates to a heteropoly acid catalyst which is used for the production of methacrylic acid by gas phase oxidation of methacrolein and a preparing method thereof. The present invention, thereby, provides a novel heteropoly acid catalyst having excellent methacrolein conversion rate, methacrylic acid selectivity and yield.

Heteropoly acid catalyst and method of preparing the same

The present invention relates to a process for the preparation of 4-aminomethyl-3-alkoxyiminopyrrolidine methanesulfonate, a key intermediate of quinolone antibiotics. According to the process of the present invention, the total number of steps has been shortened to 2-3 steps, the solid separation is not required, and the use of costly chemicals, particularly (BOC)O (t-butoxycarbonyl anhydride), several organic solvents and reactants, is eliminated.

Process for preparing 4-aminomethyl-3-alkoxyiminopyrrolidine methanesulfonate

The present invention relates to a process for the preparation of 4-aminomethyl-3-alkoxyiminopyrrolidine methane-sulfonate, a key intermediate of quinolone antibiotics. According to the process of the present invention, the total number of steps has been shortened to 2-3 steps, the solid separation is not required, and the use of costly chemicals, particularly (BOC)O (t-butoxycarbonyl anhydride), several organic solvents and reactants, is eliminated.

Provided is a novel heteropolyacid catalyst useful for partial oxidation of methacrolein (MACR) to methacrylic acid (MAA), as represented by the following formula 1:PMoABCDEO&#x2003;&#x2003;(1)

Heteropolyacid catalyst and method for producing the same

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Daejeon, South Korea

Gyo-Hyun Hwang