公开(公告)号：US20230132735A1

公开(公告)日：2023-05-04

申请号：US18049085

申请日：2022-10-24

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： In Wook NAH ,  Jae Ik KIM ,  Soon Jong KWAK ,  In Hwan OH

IPC: C07D317/36 ,  B01J27/24

Abstract: Disclosed are a method and an apparatus for preparing an alkylene carbonate using a polyamine-based heterogeneous catalyst. The rapid increase in reactor temperature and the risk of explosion due to heat of reaction may be prevented by recycling the produced alkylene carbonate to the reactor. Accordingly, it is possible to obtain the alkylene carbonate stably and continuously with high yield while maintaining reaction temperature and pressure constant.

公开(公告)号：US20220233997A1

公开(公告)日：2022-07-28

申请号：US17175705

申请日：2021-02-15

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  KOREA LAND & HOUSING CORPORATION

Inventor： In Wook NAH ,  Jae Ik KIM ,  Soon Jong KWAK ,  In Hwan OH ,  Daeseung KYUNG ,  Youngjong SIM ,  Yeongmin KIM ,  Han-guen AHN ,  Sang-ick CHOI

IPC: B01D53/14

Abstract: Disclosed are a carbon dioxide absorbent composition in which an N-alkylaminoalkanol; a polyhydroxyamine-based compound; and ethylenediamine and/or diethylenetriamine are mixed, a method for preparing the same, and a method and an apparatus for carbon dioxide absorption/separation using the same. Since the carbon dioxide absorbent according to the present disclosure has superior carbon dioxide absorption capacity and remarkably lower absorbent recycling temperature as compared to the existing absorbents such as monoethanolamine, etc., total energy consumption in the capturing process can be reduced greatly. In addition, since carbon dioxide is recovered at low recycling temperature, contamination by water or absorbent vapor may be prevented.