Patent ID: 7626047
Filing Date: 2009-12-01
Classification: C10L,C11C,Y02E

Abstract:
1. A method for producing a fatty acid alkyl ester for diesel fuel, including transesterification of fat/oil and alcohol, removing excessive alcohol through evaporation after completion of the transesterification, separating a heavy liquid predominantly containing glycerin, to thereby produce a light liquid predominantly containing a fatty acid alkyl ester, and treatment of the light liquid, wherein the treatment of the light liquid comprises: a first step of washing the light liquid with added water; a second step of causing wash liquid from the first step to be absorbed by high-water-absorptive resin; and a third step of removing the high-water-absorptive resin in the form of gel which has absorbed the wash liquid in the second step, wherein in said first step of washing the light liquid with added water, the washing is performed under vigorous stirring and the light liquid and added water are in an emulsion without causing separation into two layers, and in the second step the emulsion is de-emulsified.