公开(公告)号：US20220348536A1

公开(公告)日：2022-11-03

申请号：US17628717

申请日：2021-07-09

Applicant: LG CHEM, LTD.

Inventor： Sang Cheol SHIN ,  Jun Seok KO ,  Yong Heon CHO ,  Joon Ho SHIN

IPC: C07C253/34 ,  C07C253/02

Abstract: Disclosed is a recovery method of a nitrile-based monomer including: supplying a feed stream including a nitrile-based monomer, a nitrogen compound, and water to a first distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; condensing the upper discharge stream of the first distillation tower and supplying the condensed stream to a decanter to separate the stream into a water layer and an organic layer; supplying an organic layer stream discharged from the decanter to a second distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; and splitting a part of the upper discharge stream from the second distillation tower and refluxing the split stream to the second distillation tower.