Sb^(3+)-Cl^--H_2O体系中三氯化锑水解平衡的研究

Research on the hydrolysis equilibrium of antimony trichloride in the Sb^(3+)-Cl^--H_2O system

研究了pH、NaCl浓度对三氯化锑水解的影响。结果表明:随着总氯离子浓度的增加,溶液中的锑离子浓度显著增加,并且三氯化锑水解产物由易到难顺序依次为Sb_4O_5Cl_2、SbOCl、Sb_2O_3、Sb(OH)_3。D当加入的总氯离子浓度<6 mol/L时,其与锑离子的配合导致平衡时溶液中所含锑离子浓度也显著增加。当总锑离子浓度一定时,随着pH的增加,平衡时溶液中所含锑离子浓度减少。

The influence of pH and concentration of NaCl on hydrolysis of antimony trichloride was studied.The result showed that the concentration of antimony ion in solution increased with the increasing of total antimony ion,and the hydrolysates production of antimony trichloride are Sb_4Cl_2、SbOCl、Sb_2O_3 and Sb（OH）_3 from the easy to difficult.When the total chlorine ion concentration is up to 6mol/L,the antimony ion concentration increases in the balance solution due to the effect of coordination.Meanwhile,the concentration of antimony ion in solution decreased with the increasing of pH value when the total antimony ion concentration was constant.