Solubilities of Pb+2, Bi+3, Sb+3, and Cu+1 sulfides in (NaCl+KCl+Na2S) melts |
| |
Authors: | O P Mohapatra C B Alcock K T Jacob |
| |
Affiliation: | (1) Technical University of Berlin, Berlin, Germany;(2) Department of Metallurgy and Materials Science, University of Toronto, Toronto, Ontario, Canada |
| |
Abstract: | Solubilities of common metal sulfides have been determined in the (NaCl+KCl) eutectic melt with and without Na2S. A novel gas-phase equilibrium technique has been used for PbS, Bi2S3, and So2S3, and an improved liquid phase equilibrium technique for Cu2S, which eliminates the errors due to physical entrapment of the sulfide phase and segregation on quenching, enabling precise
measurements to be made. Solubilities in the (NaCl+KCl) eutectic melt were determined as a function of temperature in the
rante 700° to 950°C, and were found to be small. The partial molar heats of mixing of the sulfides in the eutectic melt have
been calculated from the solubility measurements, to be 13.3, 31.4, 37.1, and 49.0 kcal for PbSs), Sb2S2(l), and Cu2S(s), respectively. Sodium sulfide addition was observed to enhance these solubilities, the effect being largest for Cu2S followed by Sb2S3, Bi2S3, and PbS. This effect is explained qualitatively. It was observed that PbS and Sb2S3 obey Henry's law up to saturation in (NaCl+KCl+Na2S) melts.
O. P. MOHAPATRA, formerly Graduate Student, University of Toronto |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|