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Hyung Rok Kim

Eun Joo Jang

Jung Ho Lee

Byeong No Lee

Yo Han Han

In Sun Jung

Ho Sun Lee

Hyun Kwan Shin

A process for preparing an 1,3-alkanediol from a 3-hydroxyester includes hydrogenating a 3-hydroxyester in an alcohol-containing solvent in the presence of a hydrogenation catalyst prepared by adding an alkaline precipitator to an aqueous solution containing a copper salt to form particles, and then aging the particles following addition of colloidal silica thereto. Novel hydrogenation catalysts so prepared are also disclosed.

Process for preparing 1,3-alkanediols from 3-hydroxyesters

A process for preparing a 1,3-alkandiol from a 3-hydroxyester, comprises preparing a catalyst by adding an alkaline precipitator to an aqueous copper salt solution to form copper hydroxide particles, and aging the particles following the addition of a colloidal silica thereto; activating the catalyst by reduction with a H gas or a H -containing gas and applying a pressure of about 5 psig to about 2000 psig at a temperature of about 100&deg; C. to about 250&deg; C. in the presence of an activation solvent; and hydrogenating a 3-hydroxyester in a liquid phase slurry with a H gas or a H -containing gas and applying a pressure of about 50 psig to about 3000 psig at a temperature of about 100&deg; C. to about 250&deg; C. in the presence of the activated catalyst and a reaction solvent, whereby a 1,3-alkanediol can be selectively prepared from a 3-hydroxyester with a high yield.

Process for preparing a 1,3-alkandiol from 3-hydroxyester

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Daejun-Shi, South Korea

Hyung Rok Kim