Process for the production of fatty acid alkyl esters

Details Process for the production of fatty acid alkyl esters Process for the production of fatty acid alkyl esters

C - Chemistry, Metallurgy

07

C

260/498, 260/485

C07C 69/58 (2006.01) C11B 3/02 (2006.01) C11C 3/00 (2006.01) C11C 3/04 (2006.01)

Patent

CA 1261870

A PROCESS FOR THE PRODUCTION OF FATTY ALKYL ESTERS ABSTRACT OF THE DISCLOSURE Fatty acid alkyl esters are produced by catalytic transesterifi- cation of natural fats and oils containing free fatty acids. In a pre- liminary esterifying step, the free fatty acids present are reacted with a C1-C4 alkanol (e.g., methanol) in the presence of an acidic esterification catalyst, at a temperature of about 50 to 120°C and at substantially atmospheric pressure. The resulting reaction mixture is allowed to separate into two phases: (1) an alcohol phase containing the acidic esterification catalyst and part of the water of reaction and (2) an oil phase. These phases separately recovered. The oil phase is then extracted with an immiscible extractant, preferably comprising a mixture of glycerol and methanol, to remove residual water of reaction. In the final step the extracted oil phase is transesterified with a C1-C4 alkanol, e.g. methanol, in the presence of an aklali cat- alyst and at substantially atmospheric pressure.

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