Vapor Pressure and Distribution of Iodine for Aqueous Salt Solutions

摘要

The partial pressures and distribution coefficients of iodine were measured for aqueous chloride and sulfate salts of sodium, potassium, and magnesium and calcium chloride at various concentrations at 0 to 50 exp 0 . It was found that in the range of iodine concentrations of 10 to 272 mg/1, the iodine partial pressure and distribution coefficient for the salt solutions obey Henry's law (when iodine hydrolysis is suppressed by sulfuric acid to pH = 3). The effects of temperature, separate ions, and concentrations of salt in binary solutions on iodine partial pressure and distribution coefficient were studied. Equations are presented to express the dependence of partial pressure and distribution coefficient of iodine. A change was introduced in Kolthoff's method for determining small quantities of iodine. The addition rule was exploited for calculating the coefficient of iodine distribution between brine and vapor phases from values of iodine distribution coefficients for binary salt systems. 10 figures, 4 tables. (ERA citation 03:004575)