Influence of Cr content on catalytic oxidation active in MCM-48 catalyst

A series of MCM-48 contained chromium mesoporous molecular sieve, prepared by hydrothermal crystallization and characterized by IR, Py-IR, XRD and TG- DTA, were used to catalyze the oxidation of alpha-octadecanol and alpha-eic osanol to the corresponding acid, The evaluation of the catalytic propertie s indicated that Cr content affected the catalytic oxidation activity, The catalyst with 5%Cr gave the highest yield of alpha-octadecanoic acid and al pha-eicosanic acid, Depending on the amount Lewis acid sites in the samples , the reaction products were monitored by using IR technique, and the obtai ned results were consistent with that of chemical analysis.