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：US20210253545A1

公开(公告)日：2021-08-19

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：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.