公开(公告)号：US20210363092A1

公开(公告)日：2021-11-25

申请号：US16976049

申请日：2019-10-04

Applicant: LG CHEM, LTD.

Inventor： Hyun NAM ,  Kyung Moo LEE ,  Yukyung LIM

IPC: C07C51/48 ,  B01D3/10 ,  B01D11/04 ,  C12P7/42

Abstract: Provided is a method for purifying organic acids, comprising: a first extraction, comprising separating an aqueous solution of organic acids into a first organic layer and a first aqueous solution layer by adding a solvent containing an amine and an alcohol; removing the alcohol from the separated first organic layer; and a second extraction, comprising separating the first organic layer from which the alcohol has been removed into a second organic layer and a second aqueous solution layer by adding water.

公开(公告)号：US20210163378A1

公开(公告)日：2021-06-03

申请号：US16771141

申请日：2019-02-01

Applicant: LG CHEM, LTD.

Inventor： Hyunseok NAM ,  Jun Han KANG ,  Kyong Yong CHA ,  Jaewon JEONG ,  Dong Hyun KO ,  Jun Kyu HAN ,  Sang Jin HAN ,  Kyung Moo LEE ,  Joohyuck LEE ,  Daeheung CHOI ,  Myungji SUH ,  Ye Seul HWANG ,  Sunhwan HWANG ,  Seongmin KIM

IPC: C07C5/48 ,  C07C7/04 ,  B01D5/00

Abstract: The present specification provides a method for preparing 1,3-butadiene, the method comprising: (A) obtaining a first product comprising a light component, 1,3-butadiene, and a heavy component from a reactant comprising butene; (B) separating the heavy component from a second product comprising the 1,3-butadiene and the light component by condensing the heavy component after heat exchanging the first product; and (C) separating concentrated heavy component by reboiling the condensed heavy component.

公开(公告)号：US20210198170A1

公开(公告)日：2021-07-01

申请号：US15778584

申请日：2018-01-11

Applicant: LG CHEM, LTD.

Inventor： Hyun NAM ,  Young Ho LEE ,  Ki Yong YOON ,  Jun Hyuk LIM ,  Kyung Moo LEE

IPC: C07C37/86 ,  C07C37/78

Abstract: The present invention relates to a method for purifying phenol, which comprises: contacting a phenol stream comprising hydroxy acetone, 2-methylbenzofuran, 3-methylbenzofuran and phenol with an acyl chloride in the presence of an organic sulfonic acid to convert one or more selected from the group consisting of hydroxyacetone, 2-methylbenzofuran and 3-methylbenzofuran into a high boiling point compound having a boiling point higher than that of the phenol; and recovering the high boiling point compound from the phenol stream.