“…De Oliveira et al have studied the production of fatty acid ethyl esters from castor oil using n-hexane as solvent and two commercial lipases, Novozym 435 and Lipozyme IM, as catalysts. For this purpose, a Taguchi experimental design was adopted considering the following variables: temperature (35e65 C), water (0e10 wt/wt%), and enzyme (5e20 wt/wt%) concentrations and oilto-ethanol molar ratio (1:3 to 1:10) [15].…”