关键词:

多级电渗析, 丝氨酸, 脯氨酸, 阴离子交换膜, 双极性膜

Abstract:

In order to separate amino acids whose isoelectric points (IP) are near to each other (taking proline and serine as example), a multistage electrodialysis process was developed.In the experiment, the influences of number of stages, current intensity and concentration of NaOH on separation efficiency were investigated.The results showed that it was feasible to separate near IP amino acids by using multistage electrodialysis.Increasing the number of stages could obviously improve the purity of proline product, while have little effect on the purity of serine product，increasing current intensity could improve the purity of proline product, while have less effect on the purity of serine product.A proper amount of NaOH in the feed was helpful to the separation.

Key words:

多级电渗析, 丝氨酸, 脯氨酸, 阴离子交换膜, 双极性膜