Abstract
In this study, bentonite was modified with acidic ionic liquid (modified bentonite with ionic liquid 8B: MBIL8B) and characterized with XRD, BET, SEM and TGA analyses. The esterification of oleic acid with ethanol was studied over this modified bentonite and the effect of reaction temperature, type and amount of catalyst, molar ratio and reaction time was investigated. The results showed that the MBIL8B had higher catalytic activity than sulfuric acid and able to catalyze the esterification of oleic acid to its ethyl ester in 6.5h with yield greater than 93%. Finally, we studied the catalytic activity of MBIL8B in the esterification of other fatty acids with different alcohols.
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