Recovery and purification of hydroxy fatty acids from source...

C - Chemistry – Metallurgy – 11 – C

Patent

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C11C 1/02 (2006.01) C11C 3/00 (2006.01)

Patent

CA 2762224

A process for recovering, purifying and enriching hydroxy fatty acids from source oils. The process comprises the steps of: (a) methylating the source oil to form therein hydroxy fatty acid methyl esters and non-hydroxy fatty acid methyl esters; (b) separating the hydroxy fatty acid methyl esters from the non-hydroxy fatty acid methyl esters with an organic solvent mixture comprising a pentane/hexane and a short-chain alcohol; and (c) separately recovering the hydroxy fatty acid methyl esters and the non-hydroxy fatty acid methyl esters from the organic solvent mixture. Hydroxy fatty acids that can be recovered, purified and enriched with the process include ricinoleic acid, densipolic acid, lesquerolic acid, and auricolic acid. The non- hydroxy fatty acid methyl esters can be recovered, purified and further processed into biodiesel fuels and/or lubricants.

L'invention porte sur un procédé pour la récupération, la purification et l'enrichissement d'hydroxyacides gras à partir d'huiles sources. Le procédé comprend les étapes consistant à : (a) méthyler l'huile source pour y former des esters méthyliques d'hydroxyacides gras et des esters méthyliques d'acides gras non substitués par hydroxy ; (b) séparer les esters méthyliques d'hydroxyacides gras des esters méthyliques d'acides gras non substitués par hydroxy à l'aide d'un mélange de solvants organiques comprenant un mélange pentane/hexane et un alcool à chaîne courte ; et (c) récupérer séparément les esters méthyliques d'hydroxyacides gras et les esters méthyliques d'acides gras non substitués par hydroxy du mélange de solvants organiques. Les hydroxyacides gras qui peuvent être récupérés, purifiés et enrichis par le procédé comprennent l'acide ricinoléique, l'acide densipolique, l'acide lesquerolique et l'acide auricolique. Les esters méthyliques d'acides gras non substitués par hydroxy peuvent être récupérés, purifiés et encore transformés en carburants biodiesel et/ou lubrifiants.

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