. . . and then hydrolysing methyl propanoate in the same way:
ethanoyl chloride, propanoyl chloride etc.
This mixture is relatively easy to separate. Provided you use an excess of sodium hydroxide solution, there won't be any ester left - so you don't have to worry about that.
ethanoic anhydride, propanoic anhydride etc.
When the two layers have fully separated, the stopper is removed, and the lower aqueous layer is careful run off, don't lose any of the ester in the process!
To produce methyl benzoate by esterification
However, to prevent vapour loss by boiling/evaporation, particularly of the desired product - the ester, the vapourised liquids are condensed back into the reaction flask recycling everything.
These revision notes on the chemical synthesis, chemical properties and uses of esters, should prove useful for the NEW AQA GCSE chemistry, Edexcel GCSE chemistry & OCR GCSE chemistry (Gateway & 21st Century) GCSE (9–1), (9-5) & (5-1) science courses.
Transcript of Methyl Butanoate: Organic Chemistry Extra Credit
Methyl, ethyl, and propyl ester estersare most commonly synthesized.