BIODIESEL PRODUCTION FROM SOAPSTOCK

摘要

The invention relates to a process for production of fatty acid es~ters directly from any soapstock generated in the alkali refining processes which contains 10-60% water, 0,1-2,0% of sterols, 35-85% of fatty derivatives including partial glycerides, by * neutralizing and splitting the soaps with strong acids until reaching pH 2-8 * followed by enzymatic esterification using Lipase with concentra~tion ranging from 100 ppm - 10% by weight, using C1 to C6 alkanol in a weight ratio of 5-100% in relation to the fatty components working at tem~perature from 15-70~C via batch or continuous processes . The invention also relates to the use of fatty acid esters produced according to the invention as biodiesel.