Abstract:

The electrodialysis desalination of a crude fatty-based zwitterionic surfactant α-capric betaine was investigated. The effect of operation voltage，flow rate and pH of the solution on the electrodialysis desalination of the zwitterionic surfactant was also studied. The experiment results showed that the inorganic salts existing in the zwitterionic surfactant solution could be removed effectively. It was found that under an optimum operating condition，pH value 7.50 (at the isoelectric point of α-capric betaine)，operation voltage 10 V，and flow rate 20 L/h，the desalination efficiency was 92% and the recovery of α-capric betaine was 92.3%.

摘要： 采用电渗析法对油脂基两性表面活性剂α–癸基甜菜碱进行脱盐纯化，考察了操作电压、淡室流量、溶液pH值等操作条件对电渗析脱盐的影响。实验表明，电渗析可有效脱除两性表面活性剂中的无机盐，在α–癸基甜菜碱两性表面活性剂的等电点pH值7.50，操作电压10 V，淡室流量20 L/h的条件下，α–癸基甜菜碱粗产品脱盐率达到92%，回收率92.3%。