(中南大學 冶金與環(huán)境學院，長沙 410083)
摘 要: 以硫化鈉溶液與銻酸鈉反應制備硫代銻酸鈉，采用鹽酸溶解氧化銻得到三氯化銻溶液，添加酒石酸鉀鈉防止三氯化銻水解。當酒石酸鉀鈉與Sb3+摩爾比范圍為1.7~2.1、銻濃度低于75.24 g/L時，三氯化銻溶液在酸性、中性及堿性條件下可穩(wěn)定存在。然后，將此穩(wěn)定的三氯化銻溶液與硫代銻酸鈉溶液直接合成硫代銻酸銻(SbSbS4)，考察pH值、溫度、反應時間與洗滌方式對產(chǎn)品銻含量和銻沉淀率的影響，得到了銻含量(質(zhì)量分數(shù))為65.38%，硫含量為34.26%，形貌為無定形的硫代銻酸銻，它可明顯提高鋰基潤滑油脂的抗負荷能力。
關鍵字: 酒石酸鉀鈉；硫代銻酸銻；水解；潤滑添加劑
（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
