Process for producing fatty acid esters of lower alcohols

Details Process for producing fatty acid esters of lower alcohols Process for producing fatty acid esters of lower alcohols

C - Chemistry, Metallurgy

07

C

C07C 67/02 (2006.01) C07C 67/03 (2006.01) C07C 69/58 (2006.01)

Patent

CA 2065306

A B S T R A C T The invention relates to a process for the production of the fatty acid esters of lower monovalent alcohols by transesterification of fatty acid glycerides in the presence of basic catalysts. The process according to the invention is characterized in that the transesterification is carried outin the presence of 0.025 to 0.045 mols of an alkali or alkaline earth metal compound, preferably sodium hydroxide, potassium hydroxide, sodium or potassium alcoholate, based on 100 g of fatty acid glyceride and the subsequent purification of the fatty acid esters is effected by the addition of 0.3 to 3.0 percent of water by hydration and separation of the catalyst residues and other impurities. In contrast to the known processes, it is thus possible to obtain lower alcohols of any given high degrees of transesterification and high purity from untreated oils and fats of natural origin with contents of up to 20 percent of fatty acids in the free state at ambient temperature and atmospheric pressure at minor alcohol excess by means of the simplest equipment.

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