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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: ajax0604 on May 24, 2015, 10:30:07 PM

Title: when to utilise base or acid catalyst in the formation of an ester
Post by: ajax0604 on May 24, 2015, 10:30:07 PM

I recently studied the production of biodiesel where triglycerides are reacted with concentrated NaOH or KOH as the catalyst to make methyl esters. I was wondering, could the reaction still occur with an acid catalyst? Also, I am studying the formation of aspirin using concentrated sulfuric acid at the moment. Could the reaction occur with a base catalyst? In general, is there a preference for one type of catalyst over the other depending on the reaction? Thank you.

Title: Re: when to utilise base or acid catalyst in the formation of an ester
Post by: Hunter2 on May 25, 2015, 06:55:43 AM

First the alkaline catalyst is sodium or potassium methylate 30% in methanol. Hydroxide will guide to soap. Acidic catalysts not working, because side reaction with water take place.