公开(公告)号：US10138188B2

公开(公告)日：2018-11-27

申请号：US15653970

申请日：2017-07-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun Joo Lee ,  Hyunah Choo ,  Seungmi Yeo ,  Tran Huyen Dang ,  Jieon Lee ,  Soon Hyeok Hong ,  Dabon Lee ,  Sang Deuk Lee

IPC: B01J27/02 ,  B01J31/22 ,  C07C29/12 ,  C07C29/48 ,  C07C31/04 ,  C07C303/24 ,  C07C305/06

Abstract: Disclosed is a novel catalyst for producing a methanol precursor. The use of the catalyst enables the production of a methanol precursor and methanol with high efficiency under low temperature and low pressure conditions. Also disclosed are a methanol precursor produced using the catalyst and methanol produced using the methanol precursor.

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.