The Studies on the Esterification of Oleic Acid Using P<sub>2</sub>O<sub>5</sub>/CaCl<sub>2</sub>/Fe<sub>3</sub>O<sub>4</sub> Composite Catalysts

P 2 O 5 /CaCl 2 /Fe 3 O 4 composite catalysts for the esterification of oleic acid was proposed. Optimum conditions for the esterification of oleic acid to produce methyl ester of oleic acid were investigated which yielded a maximum conversion of oleic acid to the methyl ester. The variables were: 1) temperature and time of reaction; 2) amounts of catalyst and 3) ratio of alcohol to fatty acid.