Method and device for obtaining fatty acid esters from...

C - Chemistry – Metallurgy – 12 – P

Patent

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C12P 7/20 (2006.01) C11C 1/00 (2006.01) C11C 1/04 (2006.01) C11C 3/00 (2006.01) C11C 3/10 (2006.01) C12M 1/00 (2006.01) C12M 1/33 (2006.01) C12P 7/62 (2006.01) C12P 7/64 (2006.01)

Patent

CA 2451372

The invention relates to a method and a device for obtaining fatty acids or fatty acid esters from native oils and fats. According to the invention, lipases act on a mixture of an oil or a fat, water and optionally an oil- soluble or fat-soluble alcohol, said lipases acting as biocatalysts for separating the oil or fat and optionally for forming an ester. The reaction mixture thus formed is then placed in a self-emptying centrifuge in order to be separated into an aqueous, glycerine-containing phase and an organic phase. The centrifuge is adjusted in such a way that an intermediate layer enriched with lipase which forms between the flow of the aqueous phase and the flow of the organic phase is concentrated in the centrifuge which is emptied at pre- determined intervals. The content emptied out of the drum of the centrifuge is then reintroduced into the combined separation process or the combined separation/ester formation process.

L'invention concerne un procédé et un dispositif pour obtenir des acides gras ou des esters d'acides gras à partir d'huiles et de graisses naturelles. Selon l'invention, on fait agir des lipases sur un mélange constitué d'une huile ou d'une graisse, d'eau et, au choix, d'un alcool oléosoluble ou liposoluble agissant comme biocatalyseurs pour décomposer l'huile ou la graisse et pour former éventuellement un ester. On place ensuite le mélange réactionnel ainsi obtenu dans une centrifugeuse à déversement automatique pour le séparer en une phase aqueuse contenant de la glycérine et en une phase organique. La centrifugeuse est réglée de telle manière qu'une couche intermédiaire enrichie de lipase se formant entre l'écoulement des phases aqueuse et organique se concentre dans la centrifugeuse, qui est vidée à intervalles déterminés. Le contenu déversé par le tambour de la centrifugeuse est alors réintroduit dans le processus de séparation combiné ou dans le processus de séparation/formation d'ester combiné.

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