含氟三氯化锑溶液中和水解产物的物相

Phases of antimony trichloride solution containing fluorine neutralization-hydrolysis products

研究了含氟三氯化锑溶液中和水解产物的物相。结果表明:当三氯化锑溶液中氟离子含量较低时,中和水解初始沉淀产物物相为氯氧锑;当氟离子含量高于3mol/L时,三价锑溶液中和水解初始沉淀产物为三氧化二锑;当三价锑溶液中和水解的pH=10时,随着氟离子含量的增加,沉淀产物中斜方晶型三氧化二锑的含量随之降低,而立方晶型三氧化二锑的含量则逐渐增加;对一定含量氟离子的三氯化锑溶液,随着水解母液pH值的升高,水解产物中不同晶型三氧化二锑含量也有相同的变化规律。

The phases of antimony trichloride solutions containing fluorine neutralized-hydrolysis product were studied. The results indicate that the original nertralization-hydrolysis precipitate is antimony oxychloride （Sb4O5Cl2 ） when the fluorine content in SbCl3 solution is low. When the fluorine content exceeds 3 mol/L, the precipitate is not Sb4O5Cl2, but antimony trioxide （Sb2O3 ）. The orthorhombic Sb2O3 content in the precipitate decreases and the cubic Sb2O3 content increases gradually with the increase of fluorine content when the pH is 10. The similar phenomenon for the change of the phases has also been found with the increase of pH, and the fluorine content in SbCl3 solution keeps constant.