Process for refining glycolide and glycolide obtained therefrom

A glycolide-containing composition, wherein the composition contains glycolide, and

• (a) a polyalcohol ether having the boiling point under atmospheric pressure of greater than or equal to 180° C., for example a polyalkylene glycol ether having the boiling point under atmospheric pressure of greater than or equal to 180° C., and (b) a saturated alcohol having the boiling point under atmospheric pressure of less than or equal to 120° C., for example a saturated monohydric alcohol having the boiling point under atmospheric pressure of less than or equal to 120° C.,
• wherein, based on the total weight of the glycolide-containing composition,
• the contents of component (a) and component (b) are greater than or equal to zero, preferably both greater than zero, and the total content of component (a) and component (b) is not greater than 800 ppm, preferably not greater than 500 ppm,
• preferably, the content of component (a) is greater than zero and less than 300 ppm, the content of component (b) is greater than zero and less than 600 ppm,
• more preferably, the content of component (a) is greater than 5 ppm and less than 200 ppm, the content of component (b) is greater than 100 ppm and less than 600 ppm,
• still particularly preferably, the content of component (a) is greater than 5 ppm and less than 30 ppm, the content of component (b) is greater than 125 ppm and less than 350 ppm;
• and/or
• wherein, in the glycolide-containing composition, the terminal carboxyl content is 1-10 μmol/g, preferably 2-5 μmol/g.