Distillation: processes – separatory – Distilling to separate or remove only water – From organic compound
Reexamination Certificate
2006-01-10
2006-01-10
Manoharan, Virginia (Department: 1764)
Distillation: processes, separatory
Distilling to separate or remove only water
From organic compound
C203S029000, C203S068000, C203S069000, C203S070000, C203S077000, C203S089000, C203S091000, C562S589000, C549S274000
Reexamination Certificate
active
06984293
ABSTRACT:
Cyclic esters of hydroxy organic acids can be produced and recovered via azeotropic distillation. In certain embodiments cyclic esters, such as glycolide and lactide, can be produced from a fermentation broth or other feed stream that contains a hydroxy organic acid, an ammonium salt of a hydroxy organic acid, an amide of a hydroxy organic acid, or an ester of a hydroxy organic acid using azeotropic distillation. The hydroxy organic acid of the feed stream or the hydroxy organic acid derived from the feed stream by decomposition is reacted to produce the cyclic ester. In other embodiments a crude composition of a cyclic ester of an organic ester can be purified using azeotropic distillation.
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Cockrem Michael Charles Milner
Kovacs Istvan
Manoharan Virginia
Williams Morgan & Amerson P.C.
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