Home – Home – Jornals – Chemistry for Sustainable Development 2017 number 4

Mechanochemical synthesis of sodium thiosulphate pentahydrate (Na₂S₂O₃•5H₂O) was carried out for the first time in a planetary ball mill by mechanical activation of a suspension of sodium sulphate (Na₂SO₃) and sulphur (S). The degree of Na₂SO₃ + S = Na₂S₂O₃ reaction in suspension solution at soft and short mechanical activation conditions is almost 95 %, as established by methods of iodometric titration, X-ray phase and thermal analysis.