Al(Ⅲ)盐水解聚合过程中Al5和Al9的制备及初步表征  

Synthesis and Characterization of Al_5 and Al_9 in Solution of Hydrolyzed Al(Ⅲ)

作　　者：王瑞芬[1,2] 孙忠[1] 张胤[2] 

机构地区：[1]内蒙古大学化学化工学院,呼和浩特010021 [2]内蒙古科技大学稀土学院,包头

出　　处：《应用化学》2009年第7期878-880,共3页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20563002);内蒙古自然科学基金(200508010204);内蒙古教育厅重点项目基金(ZD01070)资助项目

摘　　要：采用铝粉、水合氯化铝和水为原料,通过调整反应温度、原料配比及溶液碱化度,经蒸发、结晶制备了铝盐水解聚合产物中的2种中间产物,即水合氯化五聚铝AlCl3.4Al(OH)3.7.5H2O和水合氯化九聚铝2AlCl3.7Al(OH)3.18H2O分别采用粉末XRD物相分析、化学分析和IR光谱对其进行了表征。以化学分析为主要监测手段,对AlCl3.4Al(OH)3.7.5H2O和2AlCl3.7Al(OH)3.18H2O的形成过程进行了研究。结果表明,随温度的变化反应基本上是一个可逆的过程,75℃是AlCl3.4Al(OH)3.7.5H2O和2AlCl3.7Al(OH).18HO析出的最佳温度,该温度下产物的结晶状态良好,其纯度分别可达99.57%和88.68%.Two new polyaluminum compounds, AlCl3 · 4Al（OH）3· 7.5H20 and 2AlCl3 · 7Al（OH）3 18H2 O, were prepared from aluminum powder, aluminum chloride and distilled water by adjusting the reaction temperature, raw material ratio and degree of basification, and evaporation and crystallization. The polyaluminum chlorides were characterized by XRD, chemical analysis and IR. We discovered that the change of reaction with the change of temperature was a reversible process. The optimal formation temperature for AlCl3 · 4Al（OH）3 · 7.5H20 and 2AlCl3· 7Al （OH）3 · 18H：O was 75 ℃. The products crystallized very well, and their purities were 99.57% and 88.68% respeatively.

关 键 词：羟基聚合铝 Al5 Al9 制备 表征 

分 类 号：O611.5[理学—无机化学]