公开(公告)号：US11420924B2

公开(公告)日：2022-08-23

申请号：US16976049

申请日：2019-10-04

申请人： LG CHEM, LTD.

发明人： Hyun Nam ,  Kyung Moo Lee ,  Yukyung Lim

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

摘要： Provided is a method for purifying organic acids, including: a first extraction which includes 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 which includes 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.