高产率丙交酯制备工艺研究  

Study on High-yield Technology of Lactide Preparation

作　　者：尤新强[1] 张舒雯[1] 张彩珠[1] 魏顺安[1] 罗鹏[1] 

机构地区：[1]重庆大学化学化工学院,重庆400044

出　　处：《世界科技研究与发展》2013年第2期223-227,共5页World Sci-Tech R&D

摘　　要：以工业级L-乳酸为原料,氧化锌为催化荆,对丙交酯合成工艺进行了探索和优化。分剐考察了催化剂用量、聚合温度、聚合时间和搅拌转速对丙交酯粗品产率的影响,通过实验把丙交酯粗品产率稳定提高至82.95%;并用气相色谱仪和微量水份测定仪对丙交酯粗品进行品质分析;丙交酯粗品用乙酸乙酯重结晶四次后用差热-热重分析仪和红外光谱仪对其进行熔点和结构表征。The preparation technology of laetide which used zinc oxide as the catalyst and L-lactic acid （technical grade） as the raw material was studied and optimized on the catalyst dosage, polymerization temperature, polymerization time and agitator speed who significantly influ- ence the yield of lactide. The experiment results, of which the qualitative analysis was conducted by gas chromatograph and trace water monitor, showed that the yield of raw lactide could achieve 82.95 % steadily. The melting point and molecular structure of lactide after 4 times recrystallization with ethyl acetate as solvent was characterized by differential thermal analysis and infrared spectrometer.

关 键 词：丙交酯 高产率 品质分析 工艺优化 

分 类 号：TQ321.2[化学工程—合成树脂塑料工业]