Method for removing organic solvent in polyisoprene crude latex

• Main Authors: LI HONGBO, HE XIAOJIN, LI WEI, XIA QINGHUA, XIN YISHUANG
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention relates to a production method of a polymer, in particular to a method for removing an organic solvent in polyisoprene crude latex. The method comprises the following steps: carrying out atmospheric distillation on crude latex of which a solvent is not removed; carrying out optional reduced pressure distillation on the concentrated latex obtained by atmospheric distillation; the method further comprises the step of spraying inert gas above the liquid level of the coarse latex in the atmospheric distillation process. The method can timely eliminate foam generated in distillation, improve the diffusion rate of the solvent, shorten the solvent removal time and avoid demulsification as much as possible. 本发明涉及聚合物的生产方法，具体涉及一种脱除聚异戊二烯粗胶乳中的有机溶剂的方法。该方法包括：将未脱除溶剂的粗胶乳进行常压蒸馏；再将常压蒸馏得到的浓缩胶乳进行可选的减压蒸馏；所述方法还包括：在常压蒸馏过程中，往粗胶乳的液面上方喷散非活性气体。该方法能够及时消除蒸馏中产生的泡沫，提高溶剂的扩散速率，缩短溶剂脱除时间，而且能够尽量避免破乳。