The redox reaction between thiourea and ferric iron and catalysis of sulphide ores

The redox reaction between ferric iron and thiourea in solution was found to be first order with respect to both Fe(III) and thiourea, and a kinetic equation has been proposed. The rate of the reaction was increased significantly by the presence of a sulphide ore and it is believed that this is responsible for the high loss of thiourea during the acidic thiourea leaching of gold-containing sulphide ores.