general notions the phthalic anhydride is an organic substance commonly used for the protection of...
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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
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