A process for producing biodiesel from renewable oil under...

C - Chemistry – Metallurgy – 11 – C

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C11C 3/10 (2006.01) C07C 69/24 (2006.01) C10G 3/00 (2006.01) C12P 7/64 (2006.01)

Patent

CA 2553653

The present invention provides a new process for producing biodiesel from renewable oil under lipase catalysis in an organic medium reaction system. In this process, a short chain alcohol ROH is used as an acyl acceptor, a relatively hydrophilic organic solvent having no negative effect on the reactivity of lipase is used as the reaction medium, and a renewable oil raw material is catalyzed by a lipase to synthesize biodiesel through a transesterification reaction. In the process of the present invention, the renewable oil raw material can be almost completely converted into biodiesel and a byproduct glycerin, and the yield of the biodiesel is 94% or more. This new type organic medium reaction system promotes the solubility of the short chain alcohol in the renewable oil raw material, and dissolves part of the byproduct glycerin. Consequently, the reaction time is shortened, the productivity of biodiesel is increased and the reactivity and lifetime of the lipase is improved in the process of the present invention.

Un nouveau procédé de production de biodiesel à partir d'huiles et de graisses catalysées par lipase dans un système de réaction à milieu organique. Dans ce processus, un ROH d'alcool à chaîne courte désigne un accepteur acyle, certains solvants relativement hydrophiles et organiques sans effet secondaire sur la réactivité de la lipase servent de milieu de réaction, les huiles et les graisses catalysées par lipase désignent une charge, la transestérification a lieu et on obtient un biodiesel. Lors du processus, les huiles et les graisses peuvent être sensiblement converties en biodiesel et en glycérine sous-produit, le rendement du biodiesel étant de 94 %. Ces nouveaux systèmes de réaction de type milieu organique peuvent favoriser la solubilité de l'alcool à chaîne courte, notamment du méthanol, dans les huiles et graisses et peuvent dissoudre une partie de la glycérine sous-produit ce qui permet d'améliorer considérablement la réactivité à la lipase, de réduire la durée de réaction enzymatique et de prolonger la durée de vie de la lipase.

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