Biodiesel is monoalkyl ester of long chain fatty acids derived from vegetable oil or animal fat, and can be used as an alternative fuel for diesel engines, where Callophyllum inophyllum oil is a potential feedstock for biodiesel production. The ocjectives of this research were to synthesis of biodiesel from Callophyllum inophyllum oil using 3%lanthanum/clay, clay and lanthanum oxide catalyst, a…