Liquid-liquid extraction of iron (III) from Ouenza iron ore leach liquor by tributylphosphate

Abstract

The solvent extraction of iron (III) from the hydrochloric acid leach liquor of iron ore from mine of Ouenza, Algeria with tributylphosphate (TBP) in chloroform was studied. The effect of several parameters, such as contact time, HCl concentration, TBP concentration and chloride inorganic salt (KCl) concentration on the efficiency of extraction of iron was examined at 19±2 °C. It was found that, for 2 min 3M TBP in presence of 5M HCl and 2 M KCl solutions led to a high yiel of extraction (98.57 %) of iron (III).The stoichiometry of the extracted species was determined by using the method of slope analysis. The number of moles of H +, Cl -and TBP associated with the extracted species was determined and the extracted species was found to be HFeCl 4 (TBP) 2 .

Best Conditions for Extraction and Stripping of Iron from Chloridic Aqueous Medium

“…It is obvious that upon increasing the extractant concentration, the percentage of iron removed increased. Devi [11] obtained the same results, at 0.05 M, the extraction of copper was only 23.05 per cent, whereas it rose to 97.5 percent at 1.0 M, in the extraction of iron (III), the percentage increased rapidly from 84.45 to 98.57 % with increasing TBP concentration [13] and for iron extraction by decanol or aliphatic alcohol in ketone the same effect of extractant concentration [15,18]. Heavy metals like Zn, Cd and Mn, their extraction efficiency increased by increasing the 8-HQ concentration [14].…”

“…The result was gotten by Devi [11], in the extraction of copper the removed percentage increases from 6.7 to 78.5% when molarity of HCl increases from 3 to 6.5M and then decreases. The same behavior was investigated in a study of the extraction of iron (III) from HCl solutions by Nouioua [13] and Sato [17] which is the distribution coefficient rises steeply with Tributyl Phosphate as an extractant. Saji [19] refers that the iron III extraction using TBP-MIBK increases with the increase in acid concentration.…”

“…In some metal extraction processes, equilibrium time quit fast (30 min. ), and increasing in time lead to a slight increase in distribution coefficient [12,13]. For others, the equilibrium time is different based on metals, Cu, Zn and Cd take about 1hr.…”

Solvent Extraction of Copper (II) Ions Using Unmodified and Aromatic Amine Modified Red Onion Skin Extract

“…This technique involves agitation of two immiscible liquids, one containing the "solute" or substance to be extracted, the other containing the extracting ligand [13,14]. The ligand used to extract a particular metal ion must have a high extracting power and optionally be selective to a particular metal or metals [15]. Thus, the choice of the extractant (ligand) often determines the success of the extraction process [16].…”