abstract |
The present invention relates to a method for producing lactide. The present invention provides optimum lactide synthesis conditions by investigating the changes in lactide yield with changes in catalyst, temperature, pressure, PLA molecular weight, and catalyst concentration during lactide production. According to the method of the present invention, it is possible to minimize the racemization reaction while maximizing the yield of lactide to be synthesized, and it is possible to obtain a molten lactide, which can be used very conveniently in a later separation process. |