The invention belongs to the field of
precious metal metallurgy, and particularly relates to a method for preparing trichloromonoammine
potassium platinate through an ultrasonic method. The preparation method comprises the following steps: carrying out ball milling on
potassium chloroplatinite, soaking with a proper amount of HCl, filtering, and dissolving pretreated
potassium chloroplatinite in water for later use; placing the obtained potassium chloroplatinite
aqueous solution in an ultrasonic field to be oscillated, heating during oscillation, adding an
ammonium acetate
aqueous solution, increasing the temperature of the
system, and performing continuous oscillation continues for 20-30 min; filtering to obtain directly recovered potassium trichloroplatinate, and reserving the filtrate for later use; adding Pt (NH3) 4Cl2 into the filtrate to generate a [Pt (NH3) 4][PtCl4] precipitate, filtering and
drying the [Pt(NH3)4][PtCl4] precipitate;
drying, mixing with potassium chloroplatinite,
grinding to green, dissolving in cold water, and
grinding. According to the preparation method provided by the invention, the potassium chloroplatinate is subjected to particle size refining and acidification pretreatment, and the whole
reaction system is synthesized in an ultrasonic field, so that the direct yield, the total yield and the content of the potassium trichloroplatinate are improved, and the preparation method is suitable for industrial production.