Extraction of Platinum from Low-Concentration Nitrate Solutions of Refining by Methods of Cementation and Sulfide Precipitation

The results of platinum extraction from a low-concentration platinum-nitrate solution using sulfide precipitation and cementation methods are presented. The problem of the study was the question of the possibility of extracting platinu (IV) from nitrate mother liquors of refining of complex ionic and quantitative composition. During the work, it was found that the best result of platinum extraction of 99.9% was achieved with zinc cementation, and subsequent nitrate treatment of the cake makes it possible to obtain a platinum-palladium concentrate with a platinum content of at least 96.1%.