Process for the production of fatty alcohols based on...

Details Process for the production of fatty alcohols based on... Process for the production of fatty alcohols based on...

C - Chemistry, Metallurgy

07

C

C07C 33/025 (2006.01) A61K 8/34 (2006.01) A61K 8/97 (2006.01) A61Q 5/00 (2006.01) A61Q 19/00 (2006.01) C07C 29/149 (2006.01) C07C 31/125 (2006.01) C11D 1/68 (2006.01) C11D 3/20 (2006.01)

Patent

CA 2174723

The invention concerns a method of producing fatty alcohols with an iodine number between 20 and 110 from vegetable oils, the alcohols consisting essentially of unsaturated fatty alcohols or mixtures of saturated and unsaturated fatty alcohols of the general formula (I): R1OH, in which R1 is a saturated or unsaturated straight-chain or branched-chain alkyl group with 8 to 22 carbon atoms. Using prior art methods, the triglycerides contained in the vegetable-oil raw materials are (a) decomposed under pressure into the constituent fatty acids and optionally esterified with methanol or (b) transesterified to give the fatty-acid methyl esters and (c) the fatty acids or fatty-acid methyl esters are hydrogenated to give fatty alcohols. The method is characterized in that the fatty acids, the fatty-acid methyl esters and/or their hydrogenation products are fractionally distilled and the first runnings taken from the distillation, the end product having an iodine number from 20 to 110. The invention also concerns fatty alcohols produced from vegetable oils having an iodine number from 20 to 95 and the use of fatty alcohols produced from vegetable oils in the manufacture of washing, rinsing and cleaning agents as well as hair-care and body-care agents.

L'invention concerne un procédé de production d'alcools gras à base végétale, dont l'indice d'iode se situe entre 20 et 110, qui contiennent des alcools gras sensiblement insaturés et des mélanges d'alcools gras saturés et insaturés de la formule générale (I): R?1¿OH, dans laquelle R?1¿ désigne un reste alkyle saturé ou insaturé, linéaire ou ramifié ayant entre 8 et 22 atomes de carbone. A l'aide de procédés connus en soi, les triglycérides contenus dans les graisses végétales constituant les matières brutes sont a) décomposés sous pression en acides gras et sont éventuellement estérifiés avec du méthanol ou b) transestérifiés pour former des esters de méthyle d'acide gras et c) les acides gras ou les esters de méthyle d'acide gras sont hydrogénés pour former des alcools gras. Ce procédé se caractérise en ce que les acides gras, les esters de méthyle d'acide gras et/ou le produit résultant de l'hydrogénation sont soumis à une distillation fractionnée, et un avant-coulant est prélevé. Le produit final présente un indice d'iode compris entre 20 et 110. L'invention concerne en outre des alcools gras à base végétale ayant un indice d'iode compris entre 20 et 95 et l'utilisation des alcools gras pour produire des détergents, des produits de rinçage et des nettoyants, ainsi que des agents de soins capillaires et corporels.

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