(中南大學(xué) 化學(xué)化工學(xué)院，長(zhǎng)沙 410083)
摘 要: 研究1,2-辛二醇對(duì)鋁酸鈉溶液種分過程的影響。結(jié)果表明，1,2-辛二醇通過吸附在晶種表面對(duì)鋁酸鈉溶液種分過程產(chǎn)生抑制作用。1,2-辛二醇的添加濃度、實(shí)驗(yàn)溫度以及苛堿濃度等因素對(duì)1,2-辛二醇改善鋁酸鈉溶液種分效果具有顯著影響。添加濃度小于1.25 mmol/L時(shí)，1,2-辛二醇對(duì)鋁酸鈉溶液的抑制程度很小；添加濃度超過1.5 mmol/L，抑制作用非常明顯。溫度越低，苛堿濃度越大，1,2-辛二醇對(duì)鋁酸鈉溶液分解抑制作用越大。
關(guān)鍵字: 鋁酸鈉溶液；1,2-辛二醇；分解率
（School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China）
Abstract:Abstract: Effect of non-ionic surfactant 1,2-Octanediol on the seeded precipitation of sodium aluminate solution has been investigated. The experimental results show that 1,2-Octanediol has inhibitory effect on gibbsite precipitation by adsorption on the surface of seeds. The concentration of 1,2-Octanediol, experimental temperature and caustic concentration of liquor can obviously affect the seeded precipitation of sodium aluminate solution. When the concentration of 1,2-Octanediol in the solution is less than 1.25 mmol/L, the inhibitory effect on gibbsite precipitation is limited. However, when the concentration of 1,2-Octanediol in the solution is higher than 1.5 mmol/L, the inhibitory effect is large. Lower temperature and higher caustic concentration of liquor will greatly increase the inhibitory effect.
Key words: sodium aluminate solution; 1,2-Octanediol; precipitation ratio
