Preparation method of aliphatic cyclic oligoester

• Main Authors: HUAN JIE, YAO LIFEI, TU YINGFENG, WANG YATAO, YANG YINCHAO, LI HONGJUAN
• Format: Patent
• Language: Chinese; English
• Published: 03.12.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; HETEROCYCLIC COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a preparation method of aliphatic cyclic oligoester. The method comprises the following steps: mixing aliphatic polyester with a low-boiling-point solvent and a catalyst to obtain a mixed solution, and heating the mixed solution to enable the aliphatic polyester to be subjected to a depolymerization cyclization reaction; and after the reaction is finished, cooling to separate out unreacted aliphatic polyester in the solution and remove the unreacted aliphatic polyester to obtain aliphatic cyclic oligoester, wherein the low-boiling-point solvent is toluene and/or xylene, and the heating temperature is 100-139 DEG C. According to the preparation method of the aliphatic cyclic oligoester disclosed by the invention, a relatively low depolymerization cyclization temperature can be used under the condition of keeping high yield, the energy consumption is reduced, and the product can be directly separated from the solvent and is convenient to purify. 本发明公开了一种脂肪族环状低聚酯的制备方法，包括以下步骤：将脂肪族聚酯与低沸点溶剂、