PLATINUM POWDER PRODUCING METHOD Russian patent published in 2006 - IPC B22F9/24 C22B11/00 

FIELD: powder metallurgy, namely production of platinum powder.

SUBSTANCE: method comprises steps of heating solution of platinum IV chloride to which hydrazine compound is added; agitating it for producing of alkali-ammonium solution of platinum II tetra-amine chloride; cleaning alkali-ammonium solution of ammonium-containing salt of platinum II by removing suspensions by filtering; depositing ammonium-containing salt of platinum II out of filtrate of alkali-ammonium solution; separating it from mother liquor, washing and baking it. According to invention composition of water and ammoniumchloroplatinate at predetermined relation of ingredients is used as initial chloride solution. Suspensions is removed out of alkali-ammonium solution of platinum II tetra-amine chloride at sustaining said solution in heated state. Filtrate of alkali-ammonium solution is cooled till crystallization. Crystals of platinum II tetra-amine chloride are deposited as ammonium-containing salt of platinum II.

EFFECT: possibility for producing highly pure powder of platinum with small content of additives at lowered expenses.

5 cl, 1 ex