公开(公告)号：US20180339955A1

公开(公告)日：2018-11-29

申请号：US15991930

申请日：2018-05-29

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Pravin Pandharinath UPARE ,  Young Kyu HWANG ,  Do Young HONG ,  Jong San CHANG ,  U Hwang LEE ,  Su Kyung LEE ,  Kyung Ho CHO

IPC: C07C29/141 ,  B01J23/72 ,  C07C31/26 ,  C07H3/02

Abstract: The present invention relates to a method for preparing mannitol which includes performing the hydrogenation of fructose in the presence of a Cu-based nanocomposite catalyst, for example, a nanocomposite catalyst of CuO(x)/SiO2(100-x) (wherein x is a real number from 20 to 90), using butanol as a solvent.

公开(公告)号：US20190291075A1

公开(公告)日：2019-09-26

申请号：US16342937

申请日：2017-10-17

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Ji Woong YOON ,  Jong San CHANG ,  Young Kyu HWANG ,  Kyung Ho CHO ,  U Hwang LEE ,  Su Kyung LEE ,  Ji Sun LEE

IPC: B01J20/22 ,  B01D53/047 ,  C07C7/12 ,  B01J20/34

Abstract: The present invention relates to an organic-inorganic hybrid nanoporous material, maintaining a nanoporous skeleton structure formed by coordination of an organic ligand containing an aromatic compound to a trivalent central metal ion, and further having an intramolecular acid anhydride functional group modified on the aromatic compound of the nanoporous skeleton structure, and thereby exhibits selectivity for olefins, and an adsorbent comprising the same. Specifically, the organic-inorganic hybrid nanoporous material of the present invention exhibits an excellent olefin-selective adsorption capacity through differences in adsorption equilibrium and adsorption rate, and thus can be usefully employed in the separation of C2-C4 hydrocarbons. Further, the olefins adsorbed to the organic-inorganic hybrid nanoporous material can be desorbed by purging of an inert gas which is not liquefied by way of mild vacuum conditions or compression, and thus, the organic-inorganic hybrid nanoporous material can be used to prepare olefins by separating C2-C4 hydrocarbon mixtures.

公开(公告)号：US20170101390A1

公开(公告)日：2017-04-13

申请号：US15290647

申请日：2016-10-11

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Jong San CHANG ,  Young Kyu HWANG ,  U Hwang LEE ,  Do Young HONG ,  Su Kyung LEE ,  Kyung Ho CHO ,  Pravin Pandharinath UPARE

IPC: C07D319/12 ,  B01D3/00 ,  B01D39/00 ,  B01J8/02 ,  B01D9/00

CPC classification number: C07D319/12 ,  B01D9/0009 ,  B01D9/0054 ,  B01D39/00 ,  C07B2200/13

Abstract: The present invention relates to a method and apparatus for preparation of lactide using a lactide purification process, comprising introducing an aqueous solution comprising lactic acid into a reactor filled with a catalyst and reacting the same to produce crude lactide vapor; and purifying the crude lactide vapor to produce lactide crystals, wherein a first purification comprises collecting and crystallizing the crude lactide vapor using a first solvent to produce lactide crystals, and separating the lactide crystal from a residue through filtration.

公开(公告)号：US20210346873A1

公开(公告)日：2021-11-11

申请号：US17270252

申请日：2019-07-04

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Young Kyu HWANG ,  Do Young HONG ,  Jaesung KWAK ,  Pandharinath Pravin UPARE ,  Dong Won HWANG ,  Jung Ho LEE ,  Jong-San CHANG ,  Joung-mo CHO ,  U Hwang LEE ,  Kyung Ho CHO ,  Su Kyung LEE

IPC: B01J23/835 ,  B01J23/62 ,  C07C29/141

Abstract: The present disclosure relates to a catalyst for preparing 1,2-pentanediol from furfural and/or furfuryl alcohol, and more particularly to a catalyst, which is configured such that a catalytically active metal containing both at least one transition metal and tin (Sn) is supported on a basic support and is capable of increasing reaction selectivity for 1,2-pentanediol, and a method of preparing 1,2-pentanediol using the same.