公开(公告)号：US11588157B2

公开(公告)日：2023-02-21

申请号：US17197893

申请日：2021-03-10

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyung Suk Oh ,  Woong Hee Lee ,  Byoung Koun Min ,  Yun Jeong Hwang ,  Ung Lee ,  Dong Ki Lee ,  Da Hye Won ,  Jai Hyun Koh

IPC: H01M8/04 ,  H01M4/90 ,  C25B11/089 ,  B22F1/142 ,  H01M4/86

Abstract: Proposed is an iridium alloy catalyst having reversible catalytic activity for an oxygen evolution reaction (OER), a hydrogen evolution reaction (HER), and a hydrogen oxidation reaction (HOR) by including an iridium alloy including iridium (Ir) and nickel (Ni). The iridium alloy catalyst according to the present disclosure is rapidly converted to an iridium alloy catalyst in an oxide form and an iridium alloy catalyst in a metallic form according to applied voltage by controlling its crystallinity. Thus, even in case an oxide layer is formed after the OER, the oxidation layer disappears during the HER and HOR and the properties of an iridium metal catalyst remain, thereby maintaining HER/HOR performance.

公开(公告)号：US10793537B1

公开(公告)日：2020-10-06

申请号：US16683260

申请日：2019-11-14

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jeong-Myeong Ha ,  Hyemin Yang ,  Ye Seul Jeong ,  Jae Wook Choi ,  Dong Jin Suh ,  Young Hyun Yoon ,  Gi Seok Yang ,  Ung Lee

IPC: C07D307/50 ,  C07H3/02

Abstract: Disclosed herein are a method of acid saccharification of biomass and a method of polymerization of furan compounds. The method of acid saccharification of biomass comprises recovering pentose-derived furan compounds produced during the acid saccharification process of biomass. The method of acid saccharification of biomass comprises introducing furan compounds into the acid saccharification process of biomass, to produce and recover furan polymers.

公开(公告)号：US20240368101A1

公开(公告)日：2024-11-07

申请号：US18379709

申请日：2023-10-13

Applicant: Korea Institute of Science and Technology

Inventor： Dong Ki LEE ,  Byeong Cheul Moon ,  Jai Hyun Koh ,  Woong Hee Lee ,  Dahye Won ,  Ung Lee ,  Hyung-Suk Oh ,  Byoung Koun Min

IPC: C07D307/68

Abstract: Exemplary embodiments of the present invention may provide a continuous production system for 2,5-furandicarboxylic acid (FDCA), the continuous production system including: raw material supply units supplying an aqueous 5-hydroxymethylfurfural (HMF) solution and a basic aqueous solution, respectively; a micro-mixing unit mixing the aqueous HMF solution and the basic aqueous solution supplied from the raw material supply units, respectively, to form a raw material mixture; an electrochemical reaction unit synthesizing FDCA while passing the raw material mixture introduced from the micro-mixing unit in a single pass; and a product storage unit storing a product discharged from the electrochemical reaction unit.

公开(公告)号：US11021429B1

公开(公告)日：2021-06-01

申请号：US16943179

申请日：2020-07-30

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun Joo Lee ,  Ung Lee ,  He Won Lee ,  Tran Huyen Dang ,  Seok Hyeon Cheong

IPC: C07C51/64 ,  C07C51/493 ,  C07C29/88

Abstract: A method for producing a methanol precursor, methyl trifluoroacetate, having high-purity includes the steps of (a) preparing methyl bisulfate by mixing a catalyst with an acid solution comprising a sulfur-containing acid to provide a first mixture and supplying methane gas to the first mixture to prepare the methyl bisulfate; and (b) preparing methyl trifluoroacetate (CF3CO2CH3) by adding trifluoroacetic acid (CF3CO2H) to the first mixture including the methyl bisulfate to provide a second mixture and distilling the second mixture under heating to prepare, separate and purify the methyl trifluoroacetate (CF3CO2CH3). Methanol may be produced by adding water to the methyl trifluoroacetate (CF3CO2CH3). A methyl ester represented by Formula 2 below may be produced by adding a carboxylic acid represented by Formula 1 below to the methyl trifluoroacetate (CF3CO2CH3): R1CO2H  (1), where R1 is selected from C1-C10 alkyl groups, R1CO2CH3  (2), where R1 is as defined in Formula 1.

公开(公告)号：US10926213B2

公开(公告)日：2021-02-23

申请号：US16454566

申请日：2019-06-27

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun Joo Lee ,  Ung Lee ,  Hong Gon Kim ,  Shinhye Cho ,  He Won Lee

IPC: C07D487/08 ,  B01D53/14 ,  B01D53/50 ,  B01D53/78 ,  C07C215/40 ,  C07D241/04

Abstract: A sulfur dioxide absorbent that is an ionic liquid including a solvent; and a salt of a diamine compound that is substituted with a hydroxyl group and has a chemical formula 1 to 3 below dissolved in the solvent: where, in Chemical Formula 1 and 2, R1-R4 are the same or different and each is independently selected from the group consisting of H, a C1-C6 alkyl, and a C1-C6 alkoxy; and where, in Chemical Formula 1 to 3, X is selected from the group consisting of Cl, Br, I, MeSO3, CF3SO3, HCO2, CF3CO2 and CH3CO2; and n is an integer of 1-10. The sulfur dioxide absorbent is constituted to selectively absorb sulfur dioxide and sulfurous acid (H2SO3) formed by combination of sulfur dioxide with water, not CO2.