| http://www.w3.org/ns/prov#value | - Alternatively, the benzene solution may be treated by extracting with dilute aqueous acid, basifying the resulting aqueous solution, extracting with benzene, removing the solvent, dissolving the residue in ethyl acetate, adding hydrogen chloride or other acid in alcohol, e. g., isopropanol, thereto, and recovering the amine as its acid salt.
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