Process for obtaining fatty acid alkyl esters, rosin acids...

C - Chemistry – Metallurgy – 07 – C

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C07C 67/02 (2006.01) C07C 51/42 (2006.01) C07C 67/08 (2006.01) C07J 75/00 (2006.01) C11B 13/00 (2006.01) C11C 1/10 (2006.01) C11C 3/00 (2006.01) C12P 7/62 (2006.01)

Patent

CA 2514700

The invention refers to a process for obtaining fatty acid alkyl esters, rosin acids and sterols from crude tall oil (CTO), which is characterized by the following steps: (b) reacting the free fatty acid present in the CTO with lower alcohols; (c) separating the fatty acid lower alkyl esters thus obtained from the remaining CTO to produce a first stream of fatty acid esters; (d) esterifying the sterols in the remaining CTO with boric acid; (e) separating the remaining rosin acids from the sterol borates previously obtained to produce a second stream of rosin acids; and (f) converting said sterol borates into the free sterols to produce a third stream of free sterols.

L'invention concerne un procédé pour obtenir des esters d'alkyle d'acide gras, des acides résiniques et des stérols à partir de tall oil brut (CTO). Ce procédé est caractérisé en ce qu'il consiste : (b) à faire réagir les acides gras libres présents dans le CTO avec des alcools de faible poids moléculaire, (c) à séparer les esters d'alkyle d'acide gras de faible poids moléculaire ainsi obtenus du CTO restant de façon à produire un premier flux d'esters d'acide gras, (d) à estérifier les stérols dans le CTO restant avec de l'acide borique, (e) à séparer les acides résiniques restants des borates de stérols obtenus au préalable de façon à produire un deuxième flux d'acides résiniques et (f) à convertir ces borates de stérols en stérols libres de façon à produire un troisième flux de stérols libres.

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