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US 12,679,793 B2Granted
Recovery of diols from a mixture
AssigneeNovamont S.p.A.
InventorMarco Cotti Comettini
Life of this patent
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Abstract
The present invention relates to a process for purifying diols obtained by fermentation, in particular to increase their recovery during distillation operations.
Claims20
A process for the recovery of diol from a mixture comprising at least one diol and higher boiling compounds, having a higher boiling point than that of the diol, said process comprising the steps of:
- (a) subjecting the said mixture to distillation, separating a fraction enriched in said higher boiling compounds;
- (b) diluting said enriched fraction separated in step (a) with water;
- (c) subjecting the fraction diluted in step (b) to one or more filtration operations, by separating a permeate comprising the diol from a retentate comprising the higher boiling compounds.
Dependencies are inferred from the claim text.