IMPROVED PROCESS FOR THE PREPARATION OF L-LACTIDE OF HIGH CHEMICAL YIELD AND OPTICAL PURITY
摘要
<p>A process for the synthesis of 100% optically pure L(+)-lactide catalyzed by zinc and tin metal catalysts of less than 150 micron particle size is disclosed. The L-lactide obtained was further purified to obtain lactide of 100% optical purity and acid impurities less than 10 meq/kg.</p>
