公开(公告)号：US20200155997A1

公开(公告)日：2020-05-21

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

Abstract: The present disclosure relates to a hydroxyl group-containing amine-based sulfur dioxide and sulfurous absorbent, and a method for preparing the same. The absorbent uses an ionic liquid in the form of a salt including a diamine compound substituted with a hydroxyl group, and can be used as an absorbent capable of removing not only sulfur dioxide (SO2) but also sulfurous acid (H2SO3) formed by combination of sulfur dioxide with water.

公开(公告)号：US20230174443A1

公开(公告)日：2023-06-08

申请号：US17945796

申请日：2022-09-15

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Ung LEE ,  Hyun Joo LEE ,  Hong Gon KIM ,  Kyeong Su KIM ,  Jae Hyung IM ,  He Won LEE

IPC: C07C29/48 ,  C01B17/90

CPC classification number: C07C29/48 ,  C01B17/90 ,  C07C2523/42

Abstract: Disclosed is a methanol and sulfuric acid co-production system capable of producing methanol and sulfuric acid in equal equivalents. Specifically, the system includes an oxidation reaction unit configured to produce methyl bisulfate (CH3OSO3H) by reacting methane gas with an acid solution in the presence of a catalyst, a reactive distillation unit disposed downstream of the oxidation reaction unit and configured to esterify methyl bisulfate (CH3OSO3H) supplied from the oxidation reaction unit with trifluoroacetic acid (CF3COOH) to obtain a product and to separate the product into methyl trifluoroacetate (CF3COOCH3) and sulfuric acid (H2SO4) through thermal distillation, and a hydrolysis reaction unit disposed downstream of the reactive distillation unit and configured to produce methanol by hydrolyzing methyl trifluoroacetate (CF3COOCH3) supplied from the reactive distillation unit, in which the reactive distillation unit recirculates the sulfuric acid resulting from separation to the oxidation reaction unit.