SEPARATION OF COBALT FROM IRON BY CHLORIDE HYDROLYSIS AT ELEVATED-TEMPERATURE

The hydrolysis rate of Go-bearing ferrous chloride at elevated tempera ture and the conditions of separation of Co from Fe have been investig ated. The hydrolysis process is comprised of the interfacial chemical reaction and the intra-grain diffusion. At the stage under the control of the interfacial chemical reaction, the apparent rate constant k eq uals to 198.79exp(-80.57/RT). The effects of the temperature, the part ial pressure ratio of water vapor and the reaction time on the Co reco very and the separation of Co from Fe are examined. The optimum hydrol ysis conditions are determined.