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Studies on the Extraction of Copper (II) by Pyrazoloquinazolinone Derivatives from Aqueous Solutions

Author Affiliations

  • 1 Nuclear Materials Authority, P.O. Box 530, El-Maadi, Cairo, EGYPT

Res.J.chem.sci., Volume 2, Issue (6), Pages 30-37, June,18 (2012)


Pyrazoloquinazolinone type extractants are effective reagents for extraction of Cu (II) ions from aqueous solutions. In this respect, extraction of copper (II) ions with 2-amino-3-(4- (X) phenyl azo)-8,9-dihydro-8,8-dimethyl-7H-pyrazolo [1,5-a] quinazolin-6- one (XPQ), (X= Br, Cl, OCH3 or CH3) were studied. The optimum studied extractants concentrations were found at 0.04% BrPQ, 0.045% ClPQ, 0.05% OCHPQ and 0.055% CHPQ in carbon tetrachloride as a diluent. Highly extraction efficiency were found at pH 2, 1/1 O/A ratio and 5 min. shaking time at room temperature. BrPQ was selected as an appropriate structure of reagents to extract Cu (II) species. The proposed method was used in extraction of copper (II) ions in some standard reference geologic samples.


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