Method and device for synthesizing poly (butylene succinate)

• Main Authors: MA XI, ZHANG FEI, NA ZHIYAN, DING YONGLIANG, ZHONG XIANWEI, DENG JIANWEI
• Format: Patent
• Language: Chinese; English
• Published: 25.06.2024
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention provides a method and device for synthesizing poly (butylene succinate), and the method comprises the following steps: mixing dimethyl succinate with 1, 4-butanediol, adding a transesterification catalyst, a polycondensation catalyst and a catalytic promoter, heating, carrying out transesterification, and removing methanol to obtain the poly (butylene succinate), the preparation method comprises the following steps: carrying out prepolymerization reaction on butylene succinate under a first preset vacuum degree to obtain a prepolymerization product; carrying out condensation polymerization on the pre-polymerized product under a second preset vacuum degree to obtain a poly (butylene succinate) crude product; and devolatilizing the poly (butylene succinate) crude product to obtain poly (butylene succinate), and applying the devolatilized oligomer to the ester exchange reaction. The poly (butylene succinate) product synthesized by the method is high in yield, few in auxiliary agent residue and low