Kinetics of Silver Extraction with Triisobutylphosphine Sulfide

Abstract

Kinetics of silver extraction from nitrate solutions with triisobutylphosphine sulfide dissolved in n-octane was studied. Experiments were carried out in a rotating diffusion cell. The rate constants of forward and reverse chemical reactions were evaluated: the former k^∗ _f = 1.064 × 10⁻³ m⁹/(mol³·s) and the latter k^∗ _f = 2.085 × 10⁻¹ s⁻¹. The value obtained for the activation energy shows that the process of silver extraction with triisobutylphosphine sulfide is a predominantly diffusion-controlled process.