METHOD OF DETERMINATION OF CONTENT OF PALLADIUM AND PLATINUM IN ORES Russian patent published in 2006 - IPC C22B11/00 C22B3/06 C22B3/26 G01N33/20 

FIELD: methods of determination of content of palladium and platinum in ores containing considerable amount of iron, copper, zinc and other metals.

SUBSTANCE: proposed method includes decomposition of ore by hydrofluoric and nitric acids followed by further decomposition by aqua regia, boiling-off to moist salts, dissolving of them in hydrochloric acid and extraction. Determination of content of palladium is carried out in organic phase thus obtained and that of platinum is carried out in hydrochloric acid phase. Extractants used for such determination are s-alkylisothiouronium halides and alcohols of C₅-C₈ fractions, as well as kerosene, benzene, toluene and xylols used as diluents. Used as s-alkylisothiouronium halides are chlorides, bromides and iodides from C₇ to C₁₄ and their fractions.

EFFECT: extended range of reagents and inert diluents.

2 cl, 2 ex