PROCESS FOR MANUFACTURING A CYCLIC DIESTER OF AN A-HYDROXY ACID
申请人:WAJC Samuel J.
公开号:US20090318713A1
公开(公告)日:2009-12-24
Process for manufacturing a cyclic diester of an α-hydroxy acid comprising the following steps:
a substantially anhydrous salt of a divalent metal and of an α-hydroxy acid is mixed with a strong acid, the pKa of which is less than that of the α-hydroxy acid and the salt of which with the divalent metal is hygroscopic; and
the mixture is left to react for a sufficient time in order to obtain the cyclic diester dispersed in the hygroscopic salt.