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公开(公告)号：US20230356195A1
公开(公告)日：2023-11-09
申请号：US18246068
申请日：2021-08-12
发明人： Mee Hye JEONG , Jun Yeong KIM , Da Kyoung YONG , Ji Min HA , Ki Hyun PARK
CPC分类号： B01J23/462 , C07D307/46 , B01J23/02 , B01J23/10 , B01J29/7007 , B01J35/0006 , B01J2523/22 , B01J2523/3725 , B01J2523/821 , B01J2523/25
摘要： Provided is a heterogeneous catalyst for preparing a dicarboxylic acid aromatic heterocyclic compound, the heterogeneous catalyst including an active metal; and a basic metal oxide carrier capable of carrying the active metal and forming a complex by coordinate bonding with the dicarboxylic acid aromatic heterocyclic compound.
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2.发明申请公开(公告)号：US20190245214A1
公开(公告)日：2019-08-08
申请号：US16340908
申请日：2017-12-19
发明人： Joon Young YOON , Da Kyoung YONG
CPC分类号： H01M4/8807 , D01F9/12 , D01F9/16 , D21H13/50 , D21H17/48 , D21H17/70 , D21H19/10 , D21H19/20 , D21H19/84 , D21H25/04 , D21H25/06 , H01M8/0234 , H01M8/0245 , Y02P70/56
摘要： Disclosed is a method for producing roll-type gas diffusion layer. The method includes steps of preparing a carbon paper by using carbon fiber chops having a low modulus of 10 to 100 Gpa; impregnating the prepared carbon paper with a phenol resin or the like, and then carbonizing the same at 1,800 to 2,400° C.; forming a microporous polytetrafluoroethylene resin layer on one of both sides of the carbonized carbon paper, thus to prepare a sheet-like gas diffusion layer; and then, winding the prepared sheet-like gas diffusion layer on a roll.
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公开(公告)号：US20240342689A1
公开(公告)日：2024-10-17
申请号：US18290917
申请日：2021-07-28
发明人： Mee Hye JEONG , Jun Yeong KIM , Da Kyoung YONG , Ji Min HA , Ki Hyun PARK
CPC分类号： B01J23/462 , B01J23/34 , B01J23/52 , B01J23/54 , B01J37/0201 , B01J37/04 , B01J37/08 , B01J2231/70
摘要： The present invention relates to a heterogeneous catalyst for making a dicarboxyl acid aromatic heterocyclic compound and a method for preparing a dicarboxyl acid aromatic heterocyclic compound, and according to the present invention, an oxide with improved yield and purity can be produced by an oxidation reaction of a bio-based aromatic heterocyclic compound under a heterogeneous catalyst.
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公开(公告)号：US20230365746A1
公开(公告)日：2023-11-16
申请号：US18246085
申请日：2021-08-12
发明人： Da Kyoung YONG , Mee Hye JEONG , Jun Yeong kIM , Ji Min HA , Eun Ji Kim , Ki Hyun PARK
IPC分类号： C08G63/83
CPC分类号： C08G63/83
摘要： The present invention provides polyester and a method for preparing same, the polyester including a repeating unit derived from dihydroxyalkyl tetrahydrofuran obtained from biomass; and a repeating unit derived from short-branched aliphatic dicarboxylic acid. Thus, the polyester has a carbon reduction effect and may be utilized as a novel biomass polyethylene terephthalate (PET) for packaging, by having excellent transparency, impact resistance, flexibility and elastic modulus compared to conventional PET.
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公开(公告)号：US20230286887A1
公开(公告)日：2023-09-14
申请号：US17769357
申请日：2020-10-29
发明人： Mee Hye JEONG , Da Kyoung YONG , Ji Min HA , Ki Hyun PARK
IPC分类号： C07C29/145 , B01J37/08 , B01J23/46
CPC分类号： C07C29/145 , B01J37/08 , B01J23/462
摘要： The present invention relates to a method for preparing 1,3-cyclopentanediol by adding a ruthenium catalyst, from which the surface oxide layer is removed, to 4-hydroxy-2-cyclopentenone. The method is simple since 1,3-cyclopentanediol can be prepared in a single step through the use of the catalyst, without forming 3-hydroxycyclopentanone, which is a reaction intermediate, and moreover, the method can not only shorten a reaction time, but can also improve a yield of 1,3-cyclopentanediol.
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公开(公告)号：US20240360059A1
公开(公告)日：2024-10-31
申请号：US18291317
申请日：2022-07-12
发明人： MI SHIN , Ji Min HA , Mee Hye JEONG , Jun Yeong KIM , Da Kyoung YONG , Ki Hyun PARK
CPC分类号： C07C29/175 , B01J21/04 , B01J23/02 , B01J23/462 , B01J35/394 , C07C35/06 , C07C49/395
摘要： Provided is a catalyst for preparing 1,3-cyclopentanediol by hydrogenation of 4-hydroxy-2-cyclopentenone, the catalyst including: a carrier including α-Al2O3; and an active metal supported on the carrier.
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公开(公告)号：US20240287012A1
公开(公告)日：2024-08-29
申请号：US18292406
申请日：2021-07-28
发明人： Mee Hye JEONG , Jun Yeong KIM , Ji Min HA , Da Kyoung YONG , Ki Hyun PARK
IPC分类号： C07D307/54 , C07D307/46
CPC分类号： C07D307/54 , C07D307/46
摘要： The present invention relates to a method for preparing a dicarboxyl acid aromatic heterocyclic compound and a dicarboxyl acid aromatic heterocyclic compound obtained thereby. According to the present invention, an oxide with improved yield and purity can be produced by an oxidation reaction of a bio-based hydroxyl-free aromatic heterocyclic compound under a heterogeneous catalyst.
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8.发明申请公开(公告)号：US20220356299A1
公开(公告)日：2022-11-10
申请号：US17635739
申请日：2020-08-28
发明人： Mee Hye JEONG , Ji Min HA , Da Kyoung YONG , Ki Hyun PARK
IPC分类号： C08G63/199 , C08G63/183 , C07C45/59 , C07C29/143 , C08G18/76 , C08G18/32 , B01J23/46
摘要： The present invention relates to a polyester or polyurethane polymer comprising a biomass-derived 1,3-cyclopentanediol monomer, and a method for preparing same.
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公开(公告)号：US20210234176A1
公开(公告)日：2021-07-29
申请号：US15734799
申请日：2019-06-11
发明人： Ji Min HA , Joon Young YOON , Da Kyoung YONG
摘要： In the present invention, a water-based wetting dispersant having an acid value of 5 mg KOH/g or more and an amine value of 10 mg KOH/g or less is used to dilute and disperse black carbon and a hydrophobic fluorine resin in an organic solvent to manufacture a slurry for microporous layer formation. In this regard, the added amount of the water-based wetting dispersant is adjusted to 5 to 30 parts by weight on the basis of 100 parts by weight of black carbon. In the present invention, the slurry is applied to at least one surface of carbon fiber paper and dried to form a microporous layer in which two independent peaks appear as analyzed on a particle size graph, followed by compression and deposition thereof to fabricate a gas diffusion layer including the microporous layer in which two independent peaks appear as analyzed on a particle size graph. With the appearance of two independent peaks on a particle size analysis graph, the gas diffusion layer of the present invention has an excellent drainage function, thereby increasing in the current value of the concentration polarization curve at the equivalent voltage value.
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