| abstract |
In the lactide recovery method of the present invention, a polylactic acid, a depolymerization catalyst and a carrier resin are prepared using the vent chamber 3 in which the first screw conveying path 11 extends, and using the first screw conveying path 11. As a recovery method of the lactide which introduce | transduces the molten resin composition containing into the vent chamber 3 hold | maintained under reduced pressure, gasifies the lactide contained in the said molten resin composition, and collects gaseous lactide from the said vent chamber, The 2nd screw conveyance path 60 for carrier resin collection | recovery was provided below the 1st screw conveyance path 11 in the vent chamber 3, It is characterized by the above-mentioned. |