Search International and National Patent Collections

1. (WO2018088182) METHOD FOR RECOVERING LACTIDE

Pub. No.:    WO/2018/088182    International Application No.:    PCT/JP2017/038174
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Tue Oct 24 01:59:59 CEST 2017
IPC: C07D 319/12
C08J 11/12
Applicants: TOYO SEIKAN CO., LTD.
東洋製罐株式会社
Inventors: ITO, Takuro
伊藤 卓郎
Title: METHOD FOR RECOVERING LACTIDE
Abstract:
A method for recovering lactide, the method comprising holding a lactide-containing resin mixture at a reduced pressure to gasify the lactide contained in the resin mixture, introducing, with evacuation, a gas mixture including the resultant gaseous lactide into a condensation line A, and recovering the lactide. The method is characterized in that the condensation line A comprises a plurality of condensers 71, 73, and 75 which have been serially arranged so that the cooling temperature successively declines and with which the lactide is collected from the gas mixture and substances other than the lactide are separated as impurities from the gas mixture.