Method of recovering lactide
    50.
    发明授权

    公开(公告)号:US10336882B2

    公开(公告)日:2019-07-02

    申请号:US15779911

    申请日:2016-12-07

    摘要: A method of recovering lactide which includes introducing a molten resin composition that contains a polylactic acid, a depolymerization catalyst and a carrier resin into a vent chamber (3) that is maintained under a reduced pressure using a first screw conveyer passage (11) that extends in the vent chamber (3), gasifying the lactide contained in the molten resin composition, and recovering a gaseous lactide from the vent chamber, wherein a second screw conveyer passage (60) is provided under the first screw conveyer passage (11) in the vent chamber (3) to recover the carrier resin.