Solvent Extraction of Divalent Metal Ions with Azacrown Ether Substituted Acylpyrazolones

摘要: Novel 4-acyl-5-pyrazolones having aza-15-crown-5 (HPMP-A15C5) and aza-18-crown-6 (HPMP-A18C6) moieties as an intramolecular synergist have been synthesized by simple coupling reactions between 1-phenyl-3-methyl-4-chloroacetyl-5-pyrazolone the corresponding azacrown ethers. The solvent extraction of divalent metal ions (Mn(2+), Co(2+), Ni(2+), Cu(2+), Zn(2+), Cd(2+) Pb(2+)) were examined. Synergistic extractions with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP) benzocrown ethers also examined for a comparison. Extractions novel acylpyrazolones unique quite different from those HPMBP synergistic effect was low, obvious difference brought ring size not observed. HPMP-A18C6 generally enhanced, compared to alone HPMBP; on contrary, HPMP-A15C5 relatively poor.