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US 2011/0257441 A1Published application
Method for purifying an alcohol from a fermentation broth using a falling film, a wiped film, a thin film or a short path evaporator
AssigneeMetabolic Explorer
InventorsPascal Rousseaux, Clement Cellier, Frederic Ollivier
Life of this patent
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Abstract
Method for purifying an alcohol from a fermentation broth comprising adding a heavy solvent, evaporating the alcohol to be purified, and mechanically drawing out of the crystallized salts by heavy solvent flow and scrapping on a falling film evaporator, a wiped film evaporator, a thin film evaporator or a short path evaporator.
Claims16
A method for purifying an alcohol from a fermentation broth, comprising the following steps:
- a) clarifying the fermentation broth in order to obtain an aqueous solution containing the alcohol, b) adding a solvent to the aqueous solution to reach a proportion of solvent of at least 10% per weight, wherein the solvent has a boiling point which is higher than the boiling point of the alcohol to be purified, c) feeding the aqueous solution containing the solvent to a falling film evaporator, a wiped film evaporator, a thin film evaporator or a short path evaporator, for evaporation of the alcohol to be purified and drawing out of crystallized salts by the solvent, d) recovering the alcohol.
Dependencies are inferred from the claim text.