Process to remove product alcohols from fermentation broth by multistep flash evaporation

Procédé pour éliminer des alcools en produit d'un bouillon de fermentation

Abstract

Procédés pour éliminer le butanol et autres alcools en produit d'un bouillon de fermentation par vaporisation sous vide.
The present invention relates to processes to remove butanol and other product alcohols from a fermentation broth employing vacuum vaporization. The method for removing a product alcohol from a fermentation broth comprises the following steps: (a) the vaporisation of a fermentation broth or a portion thereof to form one or more vapor streams, wherein vaporizing comprises: (i) vaporizing the fermentation broth or a portion thereof by one or more pre-flashes; and (ii) vaporizing the fermentation broth or a portion thereof by a flash; wherein the vapor streams comprise one or more components selected from product alcohol, water, and carbon dioxide; and (b) recovering the product alcohol from the one or more vapor streams or a portion thereof.

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