Production of high grade and high concentration of free...

C - Chemistry – Metallurgy – 11 – C

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C11C 1/00 (2006.01) C11B 13/00 (2006.01) C11C 1/02 (2006.01) C11C 1/04 (2006.01) C11C 1/08 (2006.01) C11C 1/10 (2006.01)

Patent

CA 2407811

The present invention relates to a process for the production of unsaturated and saturated free fatty acids. The process comprises the steps of: (a) selecting a starting material from the group consisting of trap oils, trap greases, yellow greases and brown greases, (b) pre-treating the oils and/or greases selected in step (a) in order to separate the oils and/or greases, from residual solids and water and obtain a mixture consisting principally of saturated and unsaturated free fatty acids, (c) bleaching the mixture of free fatty acids obtained in step (b) in order to obtain a suitable coloration thereof, (d) fractionating the bleached free fatty acids obtained in step (c) in two fractions: saturated and unsaturated fatty acids, (e) purifying the unsaturated fatty acids obtained from step (d), and purifying the saturated fatty acids obtained from step (d).

L'invention concerne un procédé pour produire des acides gras libres saturés et insaturés, comprenant les opérations suivantes: (a) sélectionner un produit de départ dans le groupe comprenant les huiles et les graisses, cuites ou non (contenues dans les eaux d'égout des restaurants et des industries alimentaires) ; (b) pré-traiter les huiles et/ou graisses sélectionnées à l'étape (a) pour les séparer des solides résiduels et de l'eau résiduelle et pour obtenir un mélange consistant principalement en acides gras libres saturés et insaturés ; (c) blanchir le mélange d'acides gras libres obtenu à l'étape (b) afin d'obtenir une coloration convenable ; (d) fractionner les acides gras libres blanchis à l'étape (c) en deux parties: les acides gras saturés et les acides gras insaturés ; (e) purifier les acides gras insaturés obtenus à l'étape (d) et purifier les acides gras saturés obtenus à l'étape (d).

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