公开(公告)号：US10138185B1

公开(公告)日：2018-11-27

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 ,  C07C31/26 ,  C07H3/02 ,  B01J23/72

CPC classification number: 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：US10195592B2

公开(公告)日：2019-02-05

申请号：US15584933

申请日：2017-05-02

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Young Kyu Hwang ,  Jong San Chang ,  Do Young Hong ,  Dong Won Hwang ,  U Hwang Lee ,  Kyung Ho Cho ,  Anil Haribhau Valekar ,  Su Kyung Lee

IPC: C07D307/00 ,  B01J27/20 ,  B01J37/03 ,  B01J37/06 ,  B01J31/26 ,  B01J35/00 ,  B01J35/10

Abstract: The present invention relates to a catalyst for transfer hydrogenation, which is formed of a metal-organic framework having an MOF-808 based X-ray diffraction pattern.A high crystalline porous MOF-808 based metal-organic framework exhibits excellent performance in the transfer hydrogenation of ethyl levulinate (EL) at high and low temperature.

公开(公告)号：US09988362B2

公开(公告)日：2018-06-05

申请号：US15098905

申请日：2016-04-14

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won Hwang ,  Pravin P. Upare ,  Jong San Chang ,  Young Kyu Hwang ,  U Hwang Lee ,  Do Young Hong

IPC: C07D307/42 ,  C07D307/36 ,  C07D307/48 ,  C07D307/50

CPC classification number: C07D307/42 ,  C07D307/36 ,  C07D307/48 ,  C07D307/50

Abstract: The present invention relates to a method for preparing for a furan derivative from biomass, comprising step (1) of preparing 5-hydroxymethylfurfural by reacting biomass and a solid acid catalyst in butanol; and step (2) of preparing a furan derivative by reacting the butanol solution of 5-hydroxymethylfurfural, obtained in step (1), with a hydrogenation catalyst.

公开(公告)号：US20240182663A1

公开(公告)日：2024-06-06

申请号：US18553718

申请日：2022-04-15

Applicant: Korea Research Institute of Chemical Technology

Inventor： Gwang Nam Yun ,  Dong Won Hwang ,  Young Kyu Hwang ,  Do Young Hong

IPC: C08J11/16 ,  C07C4/22

CPC classification number: C08J11/16 ,  C07C4/22 ,  C07C2527/236 ,  C08J2325/06

Abstract: The present disclosure relates to a method for recovering styrene monomers from waste polystyrene, and more specifically, to a method for recovering styrene monomers from waste polystyrene, in which the waste polystyrene is depolymerized using an eco-friendly solvent and a potassium-containing carbonate depolymerization catalyst to suppress the generation of ethylbenzene, etc. generated as by-products in a styrene monomer recovery step, and thus the styrene monomers can be recovered in high yield.

公开(公告)号：US11607674B2

公开(公告)日：2023-03-21

申请号：US17097454

申请日：2020-11-13

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Young Kyu Hwang ,  Jaesung Kwak ,  Maeum Lee ,  Anil Haribhau Valekar ,  Kyung Ryul Oh ,  Do Young Hong ,  A Reum Byeun ,  Dong Won Hwang ,  Joungmo Cho

IPC: C07C51/09 ,  B01J23/89 ,  B01J23/46 ,  C07C67/40

Abstract: Proposed is a catalyst complex having high activity for carbon dioxide conversion reaction that converts carbon dioxide to useful compounds through reaction of carbon dioxide and hydrocarbon containing at least one hydroxyl group, and a carbon dioxide conversion process using the same, wherein the catalyst complex includes, as an active metal in the catalyst complex, at least one of noble metals and at least one of transition metals other than noble metals, thereby having high activity for the carbon dioxide conversion reaction.

公开(公告)号：US12226760B2

公开(公告)日：2025-02-18

申请号：US17341474

申请日：2021-06-08

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Young Kyu Hwang ,  Anil Haribhau Valekar ,  Ma Eum Lee ,  Kyung Ryul Oh ,  Do Young Hong

IPC: B01J31/16 ,  B01J31/22 ,  B01J37/00 ,  B01J37/04 ,  B01J37/06 ,  B01J37/10 ,  C07C29/141 ,  C07C29/145 ,  C07C37/055 ,  C07D307/44 ,  C07D307/58

Abstract: The present disclosure relates to a metal-organic framework modified using a compound having a hydroxyl group (—OH), a catalyst for a hydrogenation reaction including the same, and a method of manufacturing the same. The catalyst according to the present disclosure has high activity to the hydrogenation reaction even at a low temperature of 30 to 40° C., thus making low-grade waste heat usable.

公开(公告)号：US11801496B2

公开(公告)日：2023-10-31

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

CPC classification number: B01J23/835 ,  B01J23/622 ,  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.

公开(公告)号：US11597709B2

公开(公告)日：2023-03-07

申请号：US17167886

申请日：2021-02-04

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won Hwang ,  Young Kyu Hwang ,  Ma Eum Lee ,  Pravin Pandharinath Upare ,  Do Young Hong

IPC: C07D307/50 ,  B01J31/02

Abstract: The present disclosure provides a preparing method for 5-alkoxymethylfurfural, including steps of (a) preparing fructose, (b) mixing the fructose, an organic acid catalyst, and an organic solvent, thereby preparing mixing solution, and (c) heating the mixing solution, thereby preparing 5-alkoxymethylfurfural.
Therefore, 5-alkoxymethylfurfural may be effectively prepared without by-products from fructose.

公开(公告)号：US10253012B2

公开(公告)日：2019-04-09

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 ,  B01D9/00 ,  B01D39/00

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：US10227668B2

公开(公告)日：2019-03-12

申请号：US15635060

申请日：2017-06-27

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won Hwang ,  Pravin Pandharinath Upare ,  Young Kyu Hwang ,  In Taek Hwang ,  Jong San Chang ,  Do Young Hong ,  U Hwang Lee

IPC: C13K1/10 ,  C13K11/00 ,  C13K13/00 ,  C13K3/00 ,  B01J27/236 ,  B01J29/40 ,  B01J29/70 ,  B01J37/00 ,  B01J37/02 ,  B01J37/03 ,  B01J37/04 ,  B01J37/06 ,  B01J37/08 ,  C07D307/50 ,  C07H1/00 ,  C07H3/02

Abstract: The present invention relates to a method for preparing fructose or xylulose from biomass comprising glucose or xylose, and a method for separating a mixture of glucose and fructose and a mixture of xylose and xylulose.