Progress on Preparation of High Purity Platinum

High purity platinum with a purity greater than 99.999% is widely applied in electronic industry and other fields, and the demand is increasing. The preparation technologies of high purity platinum were introduced, and the advantages and disadvantages of main preparation technologies were reviewed. The existing ammonium salt repeated precipitation, oxidation-hydrolysis, oxidation carrier hydrolysis, ion exchange and extraction methods all have different levels of low purity, long process, low direct yield and environmental pollution issues. It is necessary to develop high efficient and clean preparation technology of high purity platinum by studying the characteristics of base metal impurities and similar elements in the platinum solution system, designing the reasonable order of removing impurities and shortening the process flow in the future.