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本文在450℃～650℃的温度范围内,在含有0.35～5.30％(重量％)可溶钛的LiCl-NaCl-KCl(摩尔比为47.5:15:37.5)熔体中,用Ag/AgCl玻璃隔膜参比电极测定了钛的平衡电位,由此算出了Ti、Ti~(2+)、Ti~(3+)间的平衡常数,φ~0Ti~(2+)/Ti,φ~0Ti~(3+)/Ti与温度的关系式,并由歧化反应的标准自由能,估算了Ti~(2+)开始歧化的温度。从获得的数据及小型电解试验情况论证了在四氯化钛电解中采用该组成的低熔点电解质的合理性。
In the melt of LiCl-NaCl-KCl (molar ratio of 47.5: 15: 37.5) containing 0.35-5.30% (wt%) of soluble titanium in the temperature range of 450-650 ℃, Ag / AgCl glass The equilibrium potential of Ti, Ti ~ (2 +) and Ti ~ (3 +) was calculated by the diaphragms reference electrode, and the equilibrium constants of Ti, Ti ~ (2 +) / Ti, (3 +) / Ti and temperature, and the disproportionation temperature of disproportionation was estimated from the standard free energy of disproportionation reaction. From the obtained data and the small electrolysis test situation, the rationality of adopting the low melting point electrolyte of the composition in the electrolysis of titanium tetrachloride is demonstrated.