Platinum Refining: From Leaching to Roasting

Platinum Refining: From Leaching to Roasting

Platinum refining involves a series of steps to obtain high-purity platinum.

       Here's a concise overview:

            1.Leaching: Platinum and other metals are dissolved in a solution with strong oxidants

       like aqua regia and NaClO3. Silver forms a precipitate while platinum dissolves. Reaction:

     3Pt+2NaClO3+18HCl→3H2PtCl6+2NaCl+6H2O

           2.Neutralization: Adjust the high-acidity leaching solution to pH 1 using NaOH and wash

        the residue with hydrochloric acid.Platinum Refining: From Leaching to Roasting

Platinum Rhodium Finished Products

           3.Platinum Precipitation: Add ammonium chloride to the solution until no more yellow

       precipitate forms. Then, cool, filter, and wash the residue with 10% ammonium chloride. Reaction:

             H2PtCl6+2NH4Cl→(NH4)2PtCl6↓+2HCl

           4.Roasting: Heat the filtered residue to decompose ammonium chloroplatinate into sponge

      platinum. Repeat chlorination, neutralization, and roasting until pure platinum powder is obtained.

     (NH4)2PtCl6→Heating3Pt+2NH4Cl+16HCl+2N2↑

    Platinum refining is critical for various industrial applications, ensuring the metal's purity and quality.

      Equipment needed for platinum refining: reactors and other anti-corrosion chemical equipment.

    Platinum Refining: From Leaching to Roasting,learn more

 

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