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In this paper, the molecular interaction volume model (MIVM) has been used for a calculation of the activities of components of Pb–Sn–Sb ternary alloy system. The separation coefficients of the related binary alloys Sn–Pb and Sn–Sb and the vapor–liquid phase equilibrium of the Pb–Sn–Sb alloy system were also calculated by using the MIVM. Experiments for the separation of the Pb–Sn–Sb ternary alloy...
This paper was aimed at purifying praseodymium by vacuum distillation under two fractions and the purification process of praseodymium was studied. The detailed analysis of purified Pr was obtained by glow discharge mass spectrometry (GDMS) for 35 major impurity elements. High vapour pressure impurities in praseodymium melt, namely Mg, Al, Cr, Mn, Cu, Zn, Pb, Sm, Dy, Ho and Er were obviously reduced...
A novel technology was developed to remove impurities from crude lead with high impurities by vacuum distillation. Refined lead (purity over 99%) was achieved through vacuum distillation using crude lead (92.88%) with high impurities as input material under a dynamic vacuum of 5–15 Pa. The results show that vacuum distillation should be taken to obtain lead from crude lead matrix, in which low-volatile...
The recovery of titanium from the slurry formed in crude titanium tetrachloride and recycling of NaCl–AlCl 3 was studied. Experimental results showed that the titanium contained in the slurry can be effectively recovered by reactive distillation with molten NaCl–AlCl 3 . More than 99% of titanium was volatilized from the slurry by distilling at 453 K for 40 min with slurry to molten...
Based on the molecular interaction volume model (MIVM), the vapor–liquid phase equilibrium of Sn–Sb alloy was calculated, which was used to predict the element distribution of Sn–Sb alloy between vapor and liquid phase during vacuum distillation. A central composite design (CCD) was used to optimize the process parameters influencing the content of Sn in liquid phase and the direct yield of Sn. The...
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