Solvent Extraction of Ti(IV) from aqueous Sulphate Solution by Cyanex301 Dissolved in Kerosene : Equilibrium Studies.

Siddhartha Sankar Sahaa; Jewel Hossenb; Md. Moynul Islam

Volume : V, Issue : IV, April - 2016

Solvent Extraction of Ti(IV) from aqueous Sulphate Solution by Cyanex301 Dissolved in Kerosene : Equilibrium Studies.

Siddhartha Sankar Sahaa, Jewel Hossenb, Md. Moynul Islam

Abstract :

<p>&lt;p&gt;&amp;nbsp;Cyanex301 dissolved in kerosene is found to be a good extractant for the extraction of Ti(IV) from aqueous sulphate medium. The equiliation time has been determined to be ~30 min. The extent of extraction is found to increase with increasing Ti(IV) concentration in the aqueous phase, though the extraction ratio is decreased with increasing Ti(IV) concentration. The extraction is found to increase with increasing pH and cyanex301 concentration. The sulphate ion concentration has little effect on the extraction of Ti(IV) by Cyanex301. The system is found to be endothermic in the lower temperature region (&amp;lt;30o C) and exothermic over 30o C. The pH dependence of 1 and the Cyanex301 dependence of 1 in its lower concentration region as well the sulphate ion dependence of almost zero suggests the following reaction for extraction at lower concentration region of Cyanex301(HR): TiHOSO4 + HR(0) [TiOHSO4R](0) + H+ On the other hand, the extractant dependence of 5 at higher concentration region of the extractant suggests the following mechanism: TiHOSO4 + 5HR(0) [TiOHSO4R.4HR](0) + H+ satisfying the dependences of other parameters. Finally the equiliium constants for the extraction reactions suggested have been calculated to be 54.97 and 282.50 respectively.&lt;/p&gt;</p>