Method and system for the esterification of fatty acids

C - Chemistry – Metallurgy – 11 – C

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C11C 3/00 (2006.01) C07C 67/08 (2006.01) C07C 69/533 (2006.01)

Patent

CA 2480901

The invention relates to a method and system for the esterification of fatty acids and/or fatty acids contained in fats and oils with low monovalent alcohols, especially methanol. Acids, especially sulphuric acid, dissolved in lower alcohols, especially methanol and/or exclusively in lower alcohols, especially in methanol with ion exchange resins, are added to the fatty acids. The interphases of the mixtures are increased in the reaction section (3) by means of high or strong dynamic shearing cutting forces and/or turbulence. The esterification begins at high pressure and the pressure is reduced during esterification, whereby the pressure loss maintains a high interphase. Said reaction is carried out in the reaction section (3) at a high temperature.

L'invention concerne un procédé et une installation d'estérification d'acides gras et/ou d'acides gras contenus dans des graisses et des huiles avec des alcools monovalents de faible poids moléculaire, en particulier du méthanol. Les graisses sont mélangées avec de l'acide, par exemple de l'acide sulfurique, dissous dans des alcools de faible poids moléculaire, en particulier dans du méthanol et/ou avec des résines échangeuses d'ions seulement dans des alcools de faible poids moléculaire, en particulier dans du méthanol. Dans une section de réaction (3), les interphases du mélange sont agrandies par des forces de cisaillement et/ou turbulences intenses et dynamiques. L'estérification commence sous haute pression et la pression est réduite pendant l'estérification, la perte de pression maintenant une grande interphase. Cette réaction est mise en oeuvre sous haute température dans la section de réaction (3).

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