Yan Xi-yu
2014
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Journal
The Chinese Journal of Nonferrous Metals
Abstract
Sodium thioantimonate was prepared via sodium sulfide reacting with sodium antimonate, and antimony trichloride solution is obtained by hydrochloric acid leaching antimony oxide, then, sodium potassium tartrate was added to prevent hydrolysis. The aqueous solution of antimony trichloride can be stable at acidic, neutral or basic conditions when the range of molar ratio of sodium potassium tartrate to Sb3+ is 1.7-2.1 and antimony concentration is less than 75.24 g/L. Finally, sodium thioantimonate solution was added into the stable antimony trichloride solution to synthesize antimony thioantimonate. The effects of pH value, temperature, reaction time and washing methods on the antimony mass fraction of the product and antimony recovery were investigated. Amorphous antimony thioantimonate containing 65.38% Sb(mass fraction) and 34.26% S, respectively is obtained, which can obviously improve the load capacity of lithium-based lubricant.