Method for producing butanol using extractive fermentation

Details Method for producing butanol using extractive fermentation Method for producing butanol using extractive fermentation

C - Chemistry, Metallurgy

12

P

C12P 7/16 (2006.01)

Patent

CA 2756538

A method for producing butanol through microbial fermentation, in which the butanol product is removed by extraction into a water-immiscible extractant composition comprising a first solvent and a second solvent, is provided. The first solvent is selected from the group consisting of C12 to C22 fatty alcohols, C12 to C22 fatty acids, esters of C12 to C22 fatty acids, C12 to C22 fatty aldehydes, C12 to C22 fatty amides and mixtures thereof. The second solvent is selected from the group consisting of C7 to C11 alcohols, C7 to C11carboxylic acids, esters of C7 to C11 carboxylic acids, C7 to C11 aldehydes, and mixtures thereof. Also provided is a method for recovering butanol from a fermentation medium.

La présente invention concerne un procédé de production de butanol par fermentation microbienne, le butanol produit étant retiré par extraction dans une composition d'agent d'extraction immiscible à l'eau contenant un premier et un second solvant. Le premier solvant est sélectionné dans le groupe constitué par des alcools gras en C12 à C22, des acides gras en C12 à C22, des esters d'acides gras en C12 à C22, des aldéhydes gras en C12 à C22, des amides gras en C12 à C22 et des mélanges correspondants. Le second solvant est sélectionné dans le groupe constitué par des alcools en C7 à C11, des acides carboxyliques en C7 à C11, des esters d'acides carboxyliques en C7 à C11, des aldéhydes en C7 à C11 et des mélanges correspondants. L'invention concerne également un procédé de récupération du butanol d'un milieu de fermentation.

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