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公开(公告)号：US10195592B2
公开(公告)日：2019-02-05
申请号：US15584933
申请日：2017-05-02
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
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.
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公开(公告)号：US09988362B2
公开(公告)日：2018-06-05
申请号：US15098905
申请日：2016-04-14
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.
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公开(公告)号：US09687772B2
公开(公告)日：2017-06-27
申请号：US14866345
申请日：2015-09-25
Inventor： Jong-San Chang , Young Kyu Hwang , Ji Woong Yoon , Do-Young Hong , U-Hwang Lee , Sukyung Lee , Kyung Ho Cho , Dong Won Hwang , Youn-Sang Bae , Seung-Joon Lee
IPC: B01D53/04 , B01J20/22 , B01J20/28 , C01B23/00 , C01B21/04 , C01B13/02 , C10L3/10 , B01D53/22 , B01D53/047 , B01D53/02
CPC classification number: B01D53/0462 , B01D53/02 , B01D53/047 , B01D53/22 , B01D53/228 , B01D2053/224 , B01D2253/10 , B01D2253/1122 , B01D2253/20 , B01D2253/204 , B01D2253/308 , B01D2256/245 , B01D2257/102 , B01J20/223 , B01J20/28033 , C01B13/0262 , C01B21/0455 , C01B23/0057 , C01B2210/0015 , C01B2210/0046 , C01B2210/007 , C10L3/105
Abstract: The present invention relates to a nitrogen adsorbent having nitrogen selective adsorptivity by including an organic-inorganic hybrid nanoporous material having a coordinatively unsaturated metal site with density of 0.2 mmol/g to 10 mmol/g in a skeleton, surface or pore; and use thereof, such as a device separating nitrogen from a gas mixture containing nitrogen and methane, a pressure swing adsorption separation device and a temperature swing adsorption separation device for separating nitrogen provided, a method for separating nitrogen and methane from a gas mixture containing nitrogen and methane, a device for separating nitrogen, oxygen or argon, a method for separating nitrogen, oxygen or argon from a gas mixture containing nitrogen, oxygen or argon, and a method for preparing nitrogen or high purity inert gas all separated from a gas mixture containing nitrogen and inert gas.
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公开(公告)号：US09561492B2
公开(公告)日：2017-02-07
申请号：US14869138
申请日：2015-09-29
Inventor： Dong Won Hwang , Jong-San Chang , Pravin P. Upare , U-Hwang Lee , Young Kyu Hwang
IPC: C07D319/00 , B01J23/14 , C07D319/10 , C07D319/12 , B01J21/04 , B01J21/06 , B01J21/08 , B01J35/00 , C01G19/02 , B01J37/03 , B01J29/03 , B01J29/40 , B01J29/70
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.
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15.发明授权公开(公告)号：US11801496B2
公开(公告)日：2023-10-31
申请号：US17270252
申请日：2019-07-04
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.
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Patent Agency Ranking
公开(公告)号：US11597709B2
公开(公告)日：2023-03-07
申请号：US17167886
申请日：2021-02-04
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
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.
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公开(公告)号：US10227668B2
公开(公告)日：2019-03-12
申请号：US15635060
申请日：2017-06-27
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.
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19.发明申请公开(公告)号：US20180261882A1
公开(公告)日：2018-09-13
申请号：US15924033
申请日：2018-03-16
Inventor： Jong San CHANG , Young Kyu Hwang , Kyung Ho Cho , U Hwang Lee , Sue Kyung Lee , Do Young Hong , Dong Won Hwang
IPC: H01M10/0564 , H01M10/052 , H01M10/0525 , H01M10/42 , H01M4/60 , B01J20/22 , B01J20/28 , B01J20/30
CPC classification number: H01M10/0564 , B01J20/223 , B01J20/226 , B01J20/28011 , B01J20/3085 , H01M2/16 , H01M4/13 , H01M4/60 , H01M4/62 , H01M10/052 , H01M10/0525 , H01M10/0562 , H01M10/0565 , H01M10/0567 , H01M10/4235 , H01M2300/0065 , Y02C10/08 , Y02T10/7011
Abstract: Provided is a secondary battery having a battery case which accommodates an electrode assembly including a cathode, a anode, and a separator disposed between the cathode and the anode, together with an electrolyte, wherein one or more selected from the group consisting of the cathode, the anode, the separator, the electrolyte, and the interior of the battery case include, as a water adsorbent, a first organic-inorganic hybrid nanoporous material which may be regenerated by desorbing 70% or more of a total adsorption amount of adsorbed water at 150° C. or lower; and optionally, a second organic-inorganic hybrid nanoporous material, of which water adsorption capacity is higher than water desorption capacity at a relative humidity p/p0 of 0.3 or less (herein, p0 represents a saturated vapor pressure at an application temperature and p represents a vapor pressure upon adsorption).
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公开(公告)号：US20170320790A1
公开(公告)日：2017-11-09
申请号：US15584933
申请日：2017-05-02
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
CPC classification number: B01J27/20 , B01J31/26 , B01J35/002 , B01J35/1023 , B01J35/1028 , B01J35/1047 , B01J37/036 , B01J37/06
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.
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