明胶-海藻酸钙复合膜胶囊萃取Cr_2O_7^(2-)的传质动力学研究

Study on the transferring rate of extraction of Cr_2O_7^(2-) with gelatin-sodium alginate compound membrane capsule

采用胶囊化技术制备三辛胺(TOA)的明胶-海藻酸钙复合膜胶囊,考察其在硫酸介质中萃取Cr2O72-的传质动力学．通过对渗透系数的测定,得出了适于微胶囊萃取的最佳条件:海藻酸钠质量浓度为0.7％,明胶质量浓度为5％-6％,V水／V油=3 :2。

Encapsulation has been used to prepare the gelatin-sodium alginate compound membrane capsule containing Cr2 O7^2-, and the transferring kinetics of the extraction of Cr2 O7^2- in H2 SO4 has been studied. The experimental results show that the best condition was 0. 7%sodium alginate , 5%-6% sodium alginate and the ratio of V水/V油 is 3 ： 2.