General Notions The phthalic anhydride is an organic substance commonly used for the protection of...
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Transcript of General Notions The phthalic anhydride is an organic substance commonly used for the protection of...
General Notions
The phthalic anhydride is an organic substance commonly used for the protection of amine groups. It’s
also a starting reagent for the luminol’s synthesis.
Methodology
First of all handle the diethylhexylphthate
(C6H4(CO2)2[CH3CHCH2 (CH2)4]) with isopropanol that contains
sodium hydroxide (NaOH) at 10%. Then extract the sodiumftalate in H2O
separating from isopropanol (CH3-CHOH-CH3) in separating
funnel.
Add concentrate Hydrocloric acid (HCl) in the solution and put it in ice and salt so you
can get a precipitate of ftalic acid.
Ftalic acid
After filtering the precipitate, heat it at 300°C in an enhancer dehydrating the acid and
sublimating the anhydride.
Phthalic anhydride