Synthesis and Solvent Extractive Properties of Two Aliphatic Hydroxamic Acids at Different Levels of Acidity

Abstract

The main aim of this work is to prepare and study the extractive ability of some hydroxamic acid (stearohydroxamic acid (StHA) and succinohydroxamic acid (SHA)). The two compounds were prepared by coupling esters with free hydroxylamine at alkaline media. The two prepared compounds were identified by the color test with vanadium and ferric solution, their m.p and infrared. The infrared spectra of (StHA) and (SHA) gave the fundamental frequencies (in cm-1) of OH, C=O, C- N and N-O groups at 3257-3434, 1616-1635 , 1267-1274, and 977- 993, respectively. The extractibility of the prepared hydroxamic acid towards the studied metal ions (Fe3+ and Cu2+ ) were found as follows: Stearohydoxamic acid was found to have a maximum extraction for Fe (III) 96.4% at pH 5 and Cu (II) 99.8% at pH 4. Succinohydoxamic acid was found to have a maximum extraction for Fe (III) 31.1 % at pH 4 and Cu (II) 2.02 % at pH 3. The extractive proprieties of these compounds toward the metal ions Fe3+ and Cu2+ were studied at different pH levels using atomic absorption spectroscopy.