公开(公告)号：EP2712366A4

公开(公告)日：2015-08-05

申请号：EP12768239

申请日：2012-03-27

Applicant: SIOX MACHINES AB

Inventor： MARCUSSON ANDERS ,  KARTHÄUSER JOACHIM ,  HAMREFORS JAN

IPC: C08G63/90 ,  B01D11/02 ,  C08G63/08 ,  C08G63/88 ,  C08G101/00 ,  C08J9/12 ,  C08J9/18 ,  C08J9/40

CPC classification number: B01D11/0296 ,  A61L9/042 ,  B01D11/0203 ,  C08G63/90 ,  C08J9/122 ,  C08J9/18 ,  C08J9/224 ,  C08J9/232 ,  C08J2201/034 ,  C08J2203/06 ,  C08J2300/16 ,  C08J2367/04

Abstract: A method of impregnating and purifying polylactic acid (PLA), wherein PLA resin beads are subjected to a liquid C02treatment, which involves impregnation and extraction comprising at least one impregnation and extraction step, in which the PLA resin beads are brought into contact with 0,01 -1000 kg pure liquid C02 /kg PLA in a reactor for a predetermined time period, at a temperature and pressure that prevents the beads from sticking together and foaming, and - a portion of the liquid C02 is drained from the PLA beads after completion of the impregnation and extraction step, at a temperature that prevents the beads from sticking together and foaming, and at which the C02 is in liquid form, while leaving at least 0,01 kg liquid C02/kg PLA, preferably 0,01-1 kg liquid C02/kg PLA in the reactor containing the PLA resin beads, followed by evacuation of C02 gas from the reactor so as to decrease the pressure to ambient pressure, whereby the remaining liquid C02 is evaporated, thereby decreasing the temperature so as to prevent foaming at ambient pressure.

Abstract translation: 一种浸渍和净化聚乳酸（PLA）的方法，其中对PLA树脂珠进行液体CO 2处理，其包括浸渍和提取，其包括至少一个浸渍和提取步骤，其中PLA树脂珠与0接触， 01-1000kg纯液体CO 2 / kg PLA在反应器中预定的时间段，在防止珠子粘在一起并起泡的温度和压力下，和 - 一部分液体CO 2在完成后从PLA珠排出 的浸渍和萃取步骤，在防止珠子粘在一起并发泡的温度下，并且在其中CO 2为液体形式的温度下，同时留下至少0.01kg液体CO 2 / kg PLA，优选为0.01-1 kg PLA溶液中，然后从反应器中排出CO 2气体，以将压力降至环境压力，由此蒸发剩余的液体CO 2，从而减少 记录温度以防止在环境压力下发泡。