Some equilibrium relations in the system magnesium oxide-sulfur dioxide-water (acid region) at pressures below atmospheric

This thesis describes the system Magnesium Oxide-Sulfur Dioxide-Water when brought to equilibrium at various pressures of sulfur dioxide plus water vapor, ranging from the vapor pressure of water at the temperature in question to atmospheric pressure. This system is of significance because it is being used more and more in the Sulfite Process in the manufacture of wood pulp and is replacing calcium oxide or a mixture of magnesium and calcium. The solution as it comes from the absorption towers is essentially such a system. Numerous investigators have done work on the system sulfur dioxide and water and the work of Conrad and Beuschein on the similar system CaO-SO₂-H₂O is complete. Their procedure was applied to this system of which there are no data available in the literature --Introduction, page 1