公开(公告)号：US20170101390A1

公开(公告)日：2017-04-13

申请号：US15290647

申请日：2016-10-11

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Jong San CHANG ,  Young Kyu HWANG ,  U Hwang LEE ,  Do Young HONG ,  Su Kyung LEE ,  Kyung Ho CHO ,  Pravin Pandharinath UPARE

IPC: C07D319/12 ,  B01D3/00 ,  B01D39/00 ,  B01J8/02 ,  B01D9/00

CPC classification number: C07D319/12 ,  B01D9/0009 ,  B01D9/0054 ,  B01D39/00 ,  C07B2200/13

Abstract: The present invention relates to a method and apparatus for preparation of lactide using a lactide purification process, comprising introducing an aqueous solution comprising lactic acid into a reactor filled with a catalyst and reacting the same to produce crude lactide vapor; and purifying the crude lactide vapor to produce lactide crystals, wherein a first purification comprises collecting and crystallizing the crude lactide vapor using a first solvent to produce lactide crystals, and separating the lactide crystal from a residue through filtration.