Purifying cyclic esters by aqueous solvent extraction
AssigneeChronopol, Inc.
InventorsFudu Miao, Timothy J. Eggeman
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Abstract
A process is provided for the production and purification of cyclic esters in which the purification includes the introduction of an aqueous solvent into a cyclic ester containing composition and allowing two phases to form. A first phase includes cyclic esters and any organic solvent, and a second phase includes the aqueous solvent and impurities.
Claims20
A process for the purification of cyclic esters in a composition comprising cyclic esters, an organic solvent and impurities, comprising introducing an aqueous solvent into said composition and thereafter allowing said composition to separate into a first phase comprising said cyclic esters and organic solvent and a second phase comprising said aqueous solvent and impurities, wherein the amount of aqueous solvent introduced into said composition is less than about 3% based on the weight of the composition above the mutual solubility limit of water in the organic solvent.
Dependencies are inferred from the claim text.