Myongji University Industry and Academia Cooperation Foundation

Myongji University Industry and Academia Coopertaion Foundation

Wook-Jin Chung

Jeong Gil Seo

Grace M Nisola

Rey Eliseo C Torrejos

Seong-Poong Lee

Myoung Jun Park

Huaiwei Liu

Eleazer L Vivas

Kris Niño Gomez Valdehuesa

Kristine Rose Medina Ramos

Hern Kim

Mi-Deok Han

Lawrence A Limjuco

Young Deuk Yoo

Arnel B Beltran

Disclosed herein are a novel crown ether with bulky and rigid groups and a method for preparing the same. Also provided are a lithium adsorbent comprising the novel crown ether immobilized onto a nanofiber, and a method for preparing the same. The lithium-selective crown ether is synthesized through intermolecular cyclization between a bulky epoxide and a rigid aromatic compound such as 1,2-dihydroxybenzene, and can effectively recover lithium ions. For use as a lithium adsorbent, the novel crown ether with both bulky and rigid subunits is immobilized onto a polymer nanofiber. The crown ether-immobilized polymer nanofibers may be formed into a recyclable membrane.

Lithium-selective crown ether, lithium adsorbent using same, and preparation method thereof

Disclosed are a composite nanofiber membrane for the adsorption of lithium, a method for preparing the same, and a lithium recovery apparatus and method using the same. The composite nanofiber membrane for the adsorption of lithium is immobilized with manganese oxide selectively adsorptive of lithium. The composite nanofiber membrane for lithium adsorption exhibits high selectivity for lithium ions and allows for the rapid and easy diffusion of lithium ions through interstitial spaces of the adsorbent. Particularly, the lithium recovery apparatus using the composite nanofiber membrane for lithium adsorption is able to effectively adsorb lithium ions dissolved in seawater in a selective manner within a short period of time, thus reducing the time taken for the adsorption process.

Composite nanofiber membrane for adsorbing lithium, method of manufacturing the same and apparatus and method for recovering lithium using the same

Disclosed herein is a recombinant() capable of producing D-xylonic acid from D-xylose and a method for producing D-xylonic acid using the same. The recombinantproducing D-xylonic acid from D-xylose according to the present invention is a recombinantEWX4 (Microorganism deposition number KCTC11988BP) capable of producing D-xylonic acid from D-xylose. When utilizing the recombinantprepared by the method of the present invention, it is possible to produce D-xylonic acid from D-xylose with high yield while reducing production cost using sole carbon source.

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Growing community of inventors

Seongnam-si, South Korea

Wook-Jin Chung