(1. 中國科學(xué)院 過程工程研究所，北京 100080；2. 中國科學(xué)院 研究生院，北京 100049)
摘 要: 研究鋁酸鈉溶液的鹽酸中和過程對(duì)氫氧化鋁晶體的形貌、晶型和鋁酸鈉溶液分解率的影響。結(jié)果表明：隨著反應(yīng)體系pH值的下降，氫氧化鋁的形貌不斷發(fā)生變化，且pH值越大，晶體越粗大；不論pH 值如何變化，氫氧化鋁的晶型總是gibbsite型；鋁酸鈉溶液的分解率隨溶液pH值降低而升高。
關(guān)鍵字: 鋁酸鈉；氫氧化鋁；中和；納米絲
neutralization of sodium aluminate solution
（1. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China）
Abstract:Procedure for precipitating aluminium hydroxide from sodium aluminate solution was investigated, and hydrochloric acid was used as neutralization agent. Effects of pH value on the crystal morphology, crystal type and sodium aluminate decomposition ratio were studied. The experimental results show that the crystal morphology of aluminium hydroxide varies with the decreasing pH value of the solution, in addition, the higher the pH value, the larger the crystallites of the precipitates. No matter how the pH value changes, the precipitates always are gibbsite. The decomposition rate increases with the decrease of pH value.
Key words: sodium aluminate; aluminium hydrate; neutralization; nano-fibre
