Investigations on the use of 4-(5-Nonyl) pyridine as an extractant for chlorocomplexes of gallium(III) |
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| Authors: | M Ejaz M Iqbal M A Qureshi |
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| Institution: | (1) Department of Chemical Engineering, College of Engineering, King Abdul Aziz University, P. O. Box 9027, Jeddah, Saudi Arabia;(2) Present address: Research Institute, UPM, Dhahran, Saudi Arabia |
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| Abstract: | A study of the distribution of gallium(III) between hydrochloric acid solutions and 0.1M 4-(5-nonyl)-pyridine in benzene has
been undertaken. Gallium can be quantitatively extracted from moderate to concentrated acid solutions and also from dilute
acid solutions containing high concentrations of neutral cations of high charge density. The effects of acidity, the solvent
concentration and diverse ions on the extraction have been investigated. An attempt has been made to elucidate the stoichiometry
of the extracted species. The formulation of (NPy H)+ GaCl
4
−
) and (NPy−H−NPy)+ GaCl
4
−
is expected at macro and trace concentrations of the metal. The extraction coefficients of several elements have been recorded
under conditions optional for the extraction of gallium; and their factors for separations are estimated. |
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| Keywords: | |
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