Extraction chromatography experiments on repeated operation using engineering scale column system

Watanabe, So  ; Goto, Ichiro*; Nomura, Kazunori  ; Sano, Yuichi   ; Koma, Yoshikazu  

The extraction chromatography separation experiments with the engineering scale column were carried out on a simulated waste solution. Ten times repeated separation experiments with two steps flow sheet using the CMPO/SiO-P and the HDEHP/SiO-P adsorbents, respectively, provided durability of the adsorbents. The chromatograms obtained from the CMPO/SiO-P column showed reproduced profiles through the multi-cycle operations. On the other hand, the time of development and peak shapes of the representative elements for HDEHP/SiO-P column became slower and broader with the number of repeating the procedure due to leakage of HDEHP from the adsorbents.