摘要：

采用电渗析法实现乙二醛电氧化合成乙醛酸体系产品的分离，以淡化室储槽中溶液的组分含量为分析对象，分别考察电流密度、淡化室流速、温度、阴离子交换膜对电渗析作用的影响。实验结果表明，随着电流密度增大，氯离子迁移速率先增大后减小，初期电流密度可为628.7 A·m^-2；当盐酸通过率为50%，则电流密度应调整为456.6 A·m^-2，此时乙醛酸的迁移量最少，分离效果最好。当流速为3.37 cm·s^-1时，各组分迁移速率最大；当流速为4.21 cm·s^-1时，乙醛酸的迁移量较少，分离效果最好。温度升高，各物质的迁移量增大，选择性下降，操作温度在30℃最适宜；ASV膜的透过性比AHT

Abstract:

This paper attempted to separate glyoxylic acid from the system of the electro-oxidation of glyoxal by electrodialysis.The influences of current density，flow velocity，temperature and nature of anion membrane on electrodialysis were studied.The results showed that flow rate at 4.21 cm·s^-1，temperature at 30℃，AHT as anion membrane and the process with current density 628.7 A·m^-2 at early stage and 456.6 A·m^-2at later stage benefitted the separation of the system of glyoxylic acid.