(中南大学 化学化工学院，长沙 410083)
摘 要: 研究1,2-辛二醇对铝酸钠溶液种分过程的影响。结果表明，1,2-辛二醇通过吸附在晶种表面对铝酸钠溶液种分过程产生抑制作用。1,2-辛二醇的添加浓度、实验温度以及苛碱浓度等因素对1,2-辛二醇改善铝酸钠溶液种分效果具有显著影响。添加浓度小于1.25 mmol/L时，1,2-辛二醇对铝酸钠溶液的抑制程度很小；添加浓度超过1.5 mmol/L，抑制作用非常明显。温度越低，苛碱浓度越大，1,2-辛二醇对铝酸钠溶液分解抑制作用越大。
关键字: 铝酸钠溶液；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
