METHOD TO MANUFACTURE POTASSIUM TRICHLOROAMMINEPLATINATE (II) OR AMMONIUM TRICHLOROAMMINEPLATINATE (II) FROM POTASSIUM TETRACHLOROPLATINATE (II) Russian patent published in 2008 - IPC C01G55/00 

FIELD: chemistry.

SUBSTANCE: method to manufacture potassium or ammonium trichloroammineplatinate (II) implies dissolving potassium tetrachloroplatinate (II) salt in ammonium acetate solution at рН=5.4, this value being achieved by adding acetic acid. Solution is heated under reflux for 20 minutes, then oxygen- and chlorine-free strong hydrochloric acid is added to the solution to obtain 6 mol/l concentration, and solution is heated for 3 h more. When reaction is over, solution is cooled down to room temperature and precipitated trans-[Pt(NH₃)₂Cl₂] salt is filtered off. To the cooled solution, Reise salt [Pt(NH₃)₄]Cl₂·H₂O is added to precipitate binary salt [Pt(NH₃)₄]·[PtNH₃Cl₃]₂. To the dried salt, potassium tetrachloroplatinate (II) or ammonium tetrachloroplatinate (II) M₂[PtCl₄], where M=NH₄ ⁺, К⁺, dissolved in 1 М HCl, is added. Solution is heated for 30 minutes and cooled down. Resulting Magnus' salt [Pt(NH₃)₄]·[PtCl₄] is filtered off, and solution of M[PtNH₃Cl₃]·H₂O, M=NH₄ ⁺, К⁺, salt is saturated with hydrochloric acid. Resulting precipitate of М[PtNH₃Cl₃]·H₂O, М=NH₄ ⁺, К⁺, is isolated, washed with alcohol and dried.

EFFECT: increase in yield and degree of purity of potassium or ammonium trichloroammineplatinate (II).

10 ex, 2 tbl