Extraction Kinetics of Nickel (II) with 2-(2-Thiazolylazo)-4-methylphenol

Abstract

The extraction kinetics of nickel (II) ion from aqueous solution to chloroform solution of 2- (2-thiazolylazo) -4-methylphenol (TAC) was studied. The rate of extraction was controlled by the 1: 1 chelate formation reaction which proceeded by two reaction paths in aqueous kRphase: ( 1 ) Ni2+ R- NiR+, ( 2 ) Ni2+ HR 1, NiR+ H+. The estimated rate constants, kR, - and kHR, are 2.2x 104 and 3.3x 102 ismol-'ec- respectively. The temperature dependence of these reactions were determined and thermodynamic data have been calculated.