C - Chemistry – Metallurgy – 11 – B
Patent
C - Chemistry, Metallurgy
11
B
C11B 3/04 (2006.01) B01D 17/02 (2006.01) C11B 3/00 (2006.01) C11B 3/06 (2006.01) C11C 3/00 (2006.01) C11C 3/04 (2006.01)
Patent
CA 2430188
A method for pretreating crude oils and fats for subsequent alkaline transesterification with primary and/or secondary alcohols. The raw oil or fat loaded with slimy substances is treated with a mixture used at 0.1 5 wt. % in relation to the oil or fat comprising an alcohol and concentrated acid, and preferably is subsequently rinsed with an alkaline glycerol phase arising from an alkaline transesterification reaction of the above-mentioned type. After the rinsing process, the glycerol phase which is loaded with slimy substances and soaps of free fatty acids is separated as a heavy phase of neutral oil liberated from free fatty acids.
L'invention concerne un procédé de prétraitement d'huiles et de graisses brutes destinées à subir une transestérification alcaline ultérieure avec des alcools primaires et/ou secondaires. Selon ledit procédé on traite l'huile ou la graisse brute chargée en substances visqueuses avec un mélange qui, par rapport à l'huile ou à la graisse, représente 0,1 à 5 % en poids et comprend un alcool à courte chaîne et des acides concentrés. Ensuite, l'huile ou la graisse ainsi traitée est lavée avec une phase glycérine alcaline qui provient d'une réaction d'une transestérification alcaline du type mentionné, et, après le processus de lavage, la phase glycérine, qui est maintenant chargée en substances visqueuses et en savon des acides gras libres, est, en tant que phase lourde, séparée de l'huile neutre libérée des acides gras libres.
Brunner Karlheinz
Frische Rainer
Ricker Rainer
Dr. Frische Gmbh
Macrae & Co.
Westfalia Separator Ag
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