公开(公告)号：US20230203219A1

公开(公告)日：2023-06-29

申请号：US18088363

申请日：2022-12-23

Applicant: HANWHA TOTALENERGIES PETROCHEMICAL CO., LTD.

Inventor： Jung Hun KIM ,  Min Su KO ,  Sang Joon OH ,  Seok Kyoo SEO ,  Kwang In KIM ,  In Hwa HONG

IPC: C08F216/06

CPC classification number: C08F216/06

Abstract: Provided is a method of manufacturing an ethylene vinyl alcohol copolymer, the method including: introducing a monomer including ethylene and vinyl acetate, and a first solvent into a reactor to manufacture an ethylene vinyl acetate copolymer through polymerization; recovering unreacted ethylene after the polymerization; recovering unreacted vinyl acetate after the polymerization; introducing a second solvent different from the first solvent to manufacture an ethylene vinyl alcohol copolymer from the ethylene vinyl acetate copolymer through transesterification; and separating the second solvent-derived acetate produced from the transesterification by the method described herein.