(中南大学 冶金与环境学院，长沙 410083)
摘 要: 以硫化钠溶液与锑酸钠反应制备硫代锑酸钠，采用盐酸溶解氧化锑得到三氯化锑溶液，添加酒石酸钾钠防止三氯化锑水解。当酒石酸钾钠与Sb3+摩尔比范围为1.7~2.1、锑浓度低于75.24 g/L时，三氯化锑溶液在酸性、中性及碱性条件下可稳定存在。然后，将此稳定的三氯化锑溶液与硫代锑酸钠溶液直接合成硫代锑酸锑(SbSbS4)，考察pH值、温度、反应时间与洗涤方式对产品锑含量和锑沉淀率的影响，得到了锑含量(质量分数)为65.38%，硫含量为34.26%，形貌为无定形的硫代锑酸锑，它可明显提高锂基润滑油脂的抗负荷能力。
关键字: 酒石酸钾钠；硫代锑酸锑；水解；润滑添加剂
（School of Metallurgy and Environment, Central South University, Changsha 410083, China）
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.
Key words: potassium sodium tartrate; antimony thioantimonate; hydrolysis; lubricant additive
