| High purity palladium is widely used in electronics industry and other fields, and the demand is urgent. Using palladium chloride as raw material, the ammonium chloride precipitation-ammonia complex combination process was proposed to purify palladium solution, and subsequently the purified palladium solution was reduced by hydrazine hydrate for preparing high purity palladium. The results showed that the impurity elements in the palladium chloride solution dissolved under suitable conditions were effectively removed by oxidization-ammonium chloride precipitation and ammonia complex, resulting in a pure [Pd(NH3)4]Cl2 solution. After the solution was reduced by hydrazine hydrate, a 99.999% high-purity palladium was obtained, and the total content of C, O, N is less than 355×10-6. |
