Lipid rich compositions,production of lipid rich compositions,production of fatty acid alkyl esters from heterogeneous lipid mixtures

摘要

U.S.6,855,838,Issued Feb.15,2005 The present invention relates to a method tor producing fatty acid alkyl esters,involving esterifying a material containing free fatty acids (FFA) with an alcohol and an inorganic acid catalyst to form a product containing fatty acid alkyl esters,wherein (i) the material contains at least about 40% FFA and is produced by reacting a feedstock with steam and sulfuric acid at a pH of about 1 -about 2 or (ii) the material contains at least about 80% FFA and is produced by reacting a feedstock with steam and alkali at a pH of about 11 -about' 13 and further reacting the feedstock with steam and sulfuric acid at a pH of about 1-about 2.