水解聚合铝溶液中Al5和Al9的制备及初步表征

摘要/Abstract

摘要： 以相图理论为指导，采用铝粉、水合氯化铝和水为原料，创造氯化铝不断水解的条件，通过调整反应温度、原料配比及溶液碱化度，经蒸发、结晶制成了铝盐水解聚合产物中的两种中间产物：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形态过程进行了研究，结果表明，温度对于产物的行成及性能有很大的影响，并且反应随温度的变化基本上是一个可逆的过程，同时，实验表明 75℃为AlCl3•4Al(OH)3•7.5H2O和2AlCl3•7Al(OH)3•18H2O析出的最佳温度，该温度下产物的产率较高且结晶状态良好.

关键词: 水解聚合铝，Al5，Al9，制备，表征

Abstract: Under the guide of ternary diagram of AlCl3 —Al2O3—H2O, two new polyaluminum compounds which conformed as AlCl3•4Al(OH)3•7.5H2O and AlCl3•7Al(OH)3•18H2O have been made with aluminum powder, aluminum chloride and distilled water. According to adjusting the reaction temperature, configuration of raw materials and degree of basification, after evaporating and crystallizing, the polyaluminum acquired. The polyaluminum chloride is characterized by means of XRD, chemical analysis and IR. The aluminum hydrolysis process has been investigated using chemical analysis as the main testing method, we discovered that temperature plays an important part in the formation of products and its properties, at the same time, the change of reaction with the change of temperature is a reversible process. The experiment further proved that the optimal formation temperature of AlCl3•4Al(OH)3•7.5H2O and AlCl3•7Al(OH)3•18H2O is 75℃，the productivity rate of products were higher at this temperature and the crystallizability were better.

Key words: hydrolytic polymeric aluminum, Al5, Al9, synthesis, characterization

王瑞芬, 孙忠, 张胤. 水解聚合铝溶液中Al5和Al9的制备及初步表征[J]. 应用化学, 2009, 26(07): 878-880.

水解聚合铝溶液中Al5和Al9的制备及初步表征

Synthesis and characterization of Al5 and Al9 in hydrolytic polymeric aluminum aqueous solution

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