公开(公告)号：US20200061596A1

公开(公告)日：2020-02-27

申请号：US16196549

申请日：2018-11-20

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun Joo LEE ,  Jungho Jae ,  Hong Gon Kim ,  Deliana Dahnum ,  Shinhye Cho

IPC: B01J31/18 ,  C07F3/06 ,  C07C269/04 ,  B01J37/03 ,  B01J37/02

Abstract: Disclosed is a zinc-imidazole complex mixed catalyst. Also disclosed are a method for preparing the zinc-imidazole complex mixed catalyst and a method for producing a methyl N-phenyl carbamate in high yield with high selectivity in the presence of the catalyst. The zinc-imidazole complex mixed catalyst can be reused due to its high reaction stability. In addition, the use of the zinc-imidazole complex mixed catalyst leads to a marked improvement in the production yield of a methyl N-phenyl carbamate with high selectivity.

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.

公开(公告)号：US10722875B2

公开(公告)日：2020-07-28

申请号：US16196549

申请日：2018-11-20

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun Joo Lee ,  Jungho Jae ,  Hong Gon Kim ,  Deliana Dahnum ,  Shinhye Cho

IPC: B01J31/18 ,  C07F3/06 ,  C07C269/04 ,  B01J37/03 ,  B01J37/02

Abstract: Disclosed is a zinc-imidazole complex mixed catalyst. Also disclosed are a method for preparing the zinc-imidazole complex mixed catalyst and a method for producing a methyl N-phenyl carbamate in high yield with high selectivity in the presence of the catalyst. The zinc-imidazole complex mixed catalyst can be reused due to its high reaction stability. In addition, the use of the zinc-imidazole complex mixed catalyst leads to a marked improvement in the production yield of a methyl N-phenyl carbamate with high selectivity.