| abstract |
The invention relates a process of preparing glycolide from a methyl glycolate oligomer. The process comprises pyrolyzing a methyl glycolate oligomer in a pyrolysis reaction system. The pyrolysis reaction system comprises no more than 1 wt%of a polyester, a polyol, a polyacid or a combination thereof, based on the total weight of the methyl glycolate oligomer in the system. Also provided is a composition comprising greater than 90 wt%of methyl glycolate and no more than 1 wt%of a combination of the polyester, the polyol, and the polyacid, based on the weight of the composition. |