Atmospheric pressure process for preparing pure cyclic esters

Details Atmospheric pressure process for preparing pure cyclic esters Atmospheric pressure process for preparing pure cyclic esters

C - Chemistry, Metallurgy

07

D

260/354.5

C07D 319/12 (2006.01)

Patent

CA 1281729

TITLE ATMOSPHERIC PRESSURE PROCESS FOR PREPARING PURE CYCLIC ESTERS Abstract of the Disclosure This invention relates to an improved process for preparing highly pure cyclic esters by heating a polymer of the corresponding .alpha.-hydroxy acid or its ester or a copolymer of .alpha.-hydroxy acid or its ester and a thermally stable polyether in the presence of an inert gas at atmospheric pressure. The cyclic ester is carried from the reaction with the inert gas to a solvent system.

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