Ionic Equilibria and Ion Exchange of Molybdenum(VI) from Strong Acid Solution

Abstract

Ion exchange experiments of molybdenum(VI) from strong HCl and <TEX>$H_2SO_4$</TEX> solution have been done to investigate the existence of anionic complexes. The concentration of HCl and <TEX>$H_2SO_4$</TEX>was changed from 1 to 9 M. From the data on the complex formation of molybdenum in aqueous solution, a new distribution diagram of Mo(VI) was constructed in the pH range from zero to 10. AG 1 X-8, an anion exchange resin, and Diphonix, a cation exchange resin were used in the loading experiments. Ion exchange results indicate that anionic complexes of Mo(VI) begins to form from 3 M HCl and 1 M <TEX>$H_2SO_4$</TEX> solution and the tendency to form anionic complexes is stronger in HCl than in <TEX>$H_2SO_4$</TEX> solution. Our results can be utilized in the analysis of Mo(VI) in strong acid solution and in the design of a process to separate Mo(VI).