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.

公开(公告)号：US20210146344A1

公开(公告)日：2021-05-20

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

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：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：US20180002769A1

公开(公告)日：2018-01-04

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: C13K11/00 ,  C07D307/50 ,  B01J37/08 ,  B01J37/06 ,  B01J37/03 ,  B01J27/236 ,  B01J37/02 ,  B01J37/00 ,  B01J29/70 ,  B01J29/40 ,  C13K13/00 ,  B01J37/04

CPC classification number: C13K11/00 ,  B01J27/236 ,  B01J29/40 ,  B01J29/7007 ,  B01J37/009 ,  B01J37/0236 ,  B01J37/031 ,  B01J37/04 ,  B01J37/06 ,  B01J37/08 ,  C07D307/50 ,  C07H1/00 ,  C07H3/02 ,  C13K3/00 ,  C13K13/00 ,  C13K13/002 ,  C13K13/007

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.

公开(公告)号：US20220001328A1

公开(公告)日：2022-01-06

申请号：US17281904

申请日：2019-10-25

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

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

IPC: B01D53/26 ,  B01D46/00 ,  B01D53/04

Abstract: The present invention provides an energy-saving air dryer comprising: a compressor for compressing the air in the atmosphere to form compressed air; a heat exchanger which is disposed on one side of the compressor and recovers compression heat from the compressed air; a pre-filter which is disposed on one side of the heat exchanger and removes pollutants from the compressed air; a pair of adsorption towers which communicate with the pre-filter and are filled with an adsorbent, wherein dry air is formed when compressed air flows into the adsorption towers according to the opening and closing of a valve and moisture is adsorbed, or moisture is desorbed from the adsorbent when dry air retaining the compression heat recovered in the heat exchanger is transferred to the adsorption towers; and an after filter which extends from the one side of the adsorption towers and removes pollutants from the dry air from which moisture has been removed.

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：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：US20160016151A1

公开(公告)日：2016-01-21

申请号：US14869138

申请日：2015-09-29

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Jong-San CHANG ,  Pravin P. UPARE ,  U-Hwang LEE ,  Young Kyu HWANG

IPC: B01J23/14 ,  C07D319/12 ,  C01G19/02

CPC classification number: B01J23/14 ,  B01J21/04 ,  B01J21/063 ,  B01J21/066 ,  B01J21/08 ,  B01J29/0308 ,  B01J29/405 ,  B01J29/7057 ,  B01J35/0006 ,  B01J35/002 ,  B01J37/031 ,  B01J37/035 ,  C01G19/02 ,  C07D319/10 ,  C07D319/12

Abstract: The present invention provides a method for directly producing lactide by subjecting lactic acid to a dehydration reaction in the presence of a catalyst comprising a tin compound, preferably, a tin (IV) compound, wherein lactide can be produced directly or by one step from lactic acid, without going through the step of producing or separating lactic acid oligomer. The method of the present invention has advantages of causing no loss of lactic acid, having a high conversion ratio to lactic acid and a high selectivity to optically pure lactide, and maintaining a long life time of the catalyst. Further, since lactic acid oligomer is not or hardly generated and the selectivity of meso-lactide is low, the method also has an advantage that the cost for removing or purifying this can be saved.

公开(公告)号：US20250059148A1

公开(公告)日：2025-02-20

申请号：US18701820

申请日：2022-10-20

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  In Yong EOM ,  Young Kyu HWANG ,  Ma Eum LEE

IPC: C07D307/48

Abstract: According to the present disclosure, by forming normal pressure conditions in a reaction system through application of a reflux system to an aqueous phase in the presence of sulfuric acid and an inorganic salt in the dehydration reaction of biomass-derived sugar components in an open system, there is no need to include a high-pressure vessel required in a conventional 5-halomethylfurfural production process, there is no risk of safety accidents, including the explosion of a high-pressure vessel and the leakage of strong acid gas, and there is a remarkable effect in that yield is improved three-fold or more compared to the case of using a conventionally used acid catalyst under the normal pressure conditions.

公开(公告)号：US20240059722A1

公开(公告)日：2024-02-22

申请号：US18450131

申请日：2023-08-15

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Young Kyu HWANG ,  Chang Ho YOO ,  Kyung Ryul OH ,  Dong Won HWANG ,  Gwang Nam YUN ,  Mi Jung LEE

IPC: C07F15/00 ,  B01J23/46

CPC classification number: C07F15/0033 ,  B01J23/468

Abstract: Proposed are a coordination complex compound-ZIF complex and a method of preparing the same. More particularly, proposed are a coordination complex compound-ZIF complex, which is a complex on which a coordination complex compound is supported by being chemically and directly bonded to a metal vacancy site of a ZIF, capable of being usable as a heterogeneous catalyst that can be recovered and reused in subsequent processes and maintaining catalytic functions of the coordination complex compound, which is an active ingredient, and to a method of preparing the same.