ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Effect of sodium sulfate on the fusibility of aluminum electrolytes

V. Delmárová and M. Malinovský

Slovak Technical University, Bratislava

Abstract: A triangular section was cut from the quaternary system Na₃AlF₆-AlF₃-Al₂O₃-Na₂SO₄ (base on Na₂SO₄-Al₂O₃ edge and apex (2.75 NaF) AlF₃). The isotherms of the liquidus were constructed on the basis of exptl. results. Addn. of 4-6 mole % Na₂SO₄ decreased the temp. of the primary crystn. by 8-10° of a melt with a cryolite ratio (NaF/AlF₃) of 2.75. The trends of the exptl. detd. isotherms were in good agreement with those detd. by using the Schroeder-LeChatelier equation and the Temkin model, but the temps. differ.

Full paper in Portable Document Format: 2111a826.pdf (in German)

Chemical Papers 21 (11) 826–831 (1967)