| 摘要 |
<p>A catalyst and depolymerization conditions for efficiently converting a lactic acid polymer into a lactide having a high optical purity. These are used for the purpose of, e.g., subjecting a waste high-molecular lactic acid polymer to chemical recycling. Also provided is a process for producing a lactide, characterized by adding a compound of an alkaline earth metal to a lactic acid polymer and heating the mixture to 320°C or lower.</p> |
