The Esterification reference article from the English Wikipedia on 24-Jul-2004
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Esterification

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Esterification is the production of esters by reacting alcohol and carboxylic acid.

Fischer esterification

Fischer esterification is the process of forming an ester by refluxing a carboxylic acid and an alcohol in the presence of an acid (catalyst). Example for esterification reaction:ethanoic acid and methanol