铝酸钠溶液分解反应研究The Studies of Decomposition Reaction of Sodium Aluminate Solution
方敬东,吴素芳,王樟茂
摘要(Abstract)：
为了研究氧化铝生产过程中铝酸钠溶液的分解反应动力学方程及反应器的优化操作设计, 首先用络合滴定法测定了氧化铝在氢氧化钠溶液中在50~65℃范围内的溶解度, 它为研究动力学提供了基础数据, 并得出溶解度方程为: Tc/4.221857.10ln-=* 在温度精度控制在±0.1℃的间歇釜式玻璃反应器中,在温度为50~60℃、氧化钠浓度为110gL-1和起始铝酸钠浓度为1.92molL-1的条件下,进行了65~84h的铝酸钠溶液的分解反应动力学实验。通过关联实验结果确定了反应动力学方程为: ()2312)/)((/10043.83exp101664.1**--=-cccARTrttA 该方程计算值与实验值的相对误差≤5%。 将溶解度方程与动力学方程进一步应用于反应器的优化操作设计,计算表明:采用动力学方程提供的铝酸钠最优操作过程,铝酸钠的分解率能提高4%左右。
关键词(KeyWords)： 铝酸钠溶液;氢氧化铝;分解反应
基金项目(Foundation):
作者(Author): 方敬东,吴素芳,王樟茂
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