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公开(公告)号：US20220168689A1
公开(公告)日：2022-06-02
申请号：US17672965
申请日：2022-02-16
Applicant: Board of Regents, The University of Texas System , Korea Research Institute of Chemical Technology
Inventor： Simon M. Humphrey , Jong-San Chang , Young Kyu Hwang
IPC: B01D53/26 , B01D53/04 , B01D53/047 , B01J20/22 , B01J20/28
Abstract: Embodiments of the present disclosure pertain to methods of sorption of H2O from an environment by associating the environment with a porous material such that the association results in the sorption of H2O to the porous material. The porous material includes a (M)-2,4-pyridinedicarboxylic acid coordination polymer, where M is a divalent metal ion selected from the group consisting of Mn, Fe, Co, Ni, Mg, and combinations thereof. The coordination polymer has a one-dimensional pore structure and shows reversible soft-crystal behavior. The porous material may be a Mg(II) 2,4-pyridinedicarboxylic acid coordination polymer (i.e., Mg-CUK-1). The methods of the present disclosure may also include one or more steps of releasing the sorbed H2O from the porous material and reusing the porous material after the releasing step for sorption of additional H2O from the environment.
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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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Patent Agency Ranking
6.发明授权Method for producing lactide directly from lactic acid and a catalyst used therein 有权直接由乳酸生产丙交酯的方法及其中使用的催化剂公开(公告)号：US09539561B2
公开(公告)日：2017-01-10
申请号：US14422526
申请日：2013-04-24
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.
Abstract translation: 本发明提供一种在含有锡化合物，优选锡（IV）化合物的催化剂存在下使乳酸进行脱水反应直接生产丙交酯的方法，其中丙交酯可直接或通过一步从乳酸 酸，而不经过生产或分离乳酸低聚物的步骤。 本发明的方法具有不会损失乳酸，乳酸转化率高，对光学纯丙交酯具有高选择性，并保持催化剂寿命长的优点。 此外，由于乳酸低聚物不是或几乎不产生，内消旋 - 丙交酯的选择性低，所以该方法还具有可以节省除去或纯化成本的优点。
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公开(公告)号：US11285455B2
公开(公告)日：2022-03-29
申请号：US16342937
申请日：2017-10-17
Inventor： Ji Woong Yoon , Jong San Chang , Young Kyu Hwang , Kyung Ho Cho , U Hwang Lee , Su Kyung Lee , Ji Sun Lee
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.
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公开(公告)号：US11266948B2
公开(公告)日：2022-03-08
申请号：US16540728
申请日：2019-08-14
Applicant: Board of Regents, The University of Texas System , Korea Research Institute of Chemical Technology
Inventor： Simon M. Humphrey , Jong-San Chang , Young Kyu Hwang
IPC: B01J20/22 , B01D53/26 , B01D53/04 , B01D53/047 , B01J20/28
Abstract: Embodiments of the present disclosure pertain to methods of sorption of H2O from an environment by associating the environment with a porous material such that the association results in the sorption of H2O to the porous material. The porous material includes a (M)-2,4-pyridinedicarboxylic acid coordination polymer, where M is a divalent metal ion selected from the group consisting of Mn, Fe, Co, Ni, Mg, and combinations thereof. The coordination polymer has a one-dimensional pore structure and shows reversible soft-crystal behavior. The porous material may be a Mg(II) 2,4-pyridinedicarboxylic acid coordination polymer (i.e., Mg-CUK-1). The methods of the present disclosure may also include one or more steps of releasing the sorbed H2O from the porous material and reusing the porous material after the releasing step for sorption of additional H2O from the environment.
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公开(公告)号：US20200054991A1
公开(公告)日：2020-02-20
申请号：US16540728
申请日：2019-08-14
Applicant: Board of Regents, The University of Texas System , Korea Research Institute of Chemical Technology
Inventor： Simon M. Humphrey , Jong-San Chang , Young Kyu Hwang
IPC: B01D53/26 , B01D53/04 , B01D53/047 , B01J20/22 , B01J20/28
Abstract: Embodiments of the present disclosure pertain to methods of sorption of H2O from an environment by associating the environment with a porous material such that the association results in the sorption of H2O to the porous material. The porous material includes a (M)-2,4-pyridinedicarboxylic acid coordination polymer, where M is a divalent metal ion selected from the group consisting of Mn, Fe, Co, Ni, Mg, and combinations thereof. The coordination polymer has a one-dimensional pore structure and shows reversible soft-crystal behavior. The porous material may be a Mg(II) 2,4-pyridinedicarboxylic acid coordination polymer (i.e., Mg-CUK-1). The methods of the present disclosure may also include one or more steps of releasing the sorbed H2O from the porous material and reusing the porous material after the releasing step for sorption of additional H2O from the environment.
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公开(公告)号：US20190217277A1
公开(公告)日：2019-07-18
申请号：US16329469
申请日：2017-11-09
Inventor： Jong Yeol Jeon , Man Jae Gil , Dong Won Hwang , Young Kyu Hwang , Yoo Han Han
Abstract: The present invention relates to an olefin metathesis reaction catalyst where rhenium (Re) oxide or molybdenum (Mo) oxide is supported, as a catalyst main component, on a surface-modified mesoporous silica or mesoporous alumina support, and a preparation method therefor. The olefin metathesis reaction catalyst of the present invention allows highly efficient metathesis of long-chain unsaturated hydrocarbons having at least eight carbons at a low temperature of 150° C. or lower. The catalyst can be separated readily from reaction solution, regenerated at a low temperature of 400° C. or lower by removing toxins accumulated on it during the metathesis reaction, and used repeatedly in metathesis reaction many times, thereby being made good use in commercial olefin metathesis processes.
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