The effect of electrodialysis on several Kaolins

Six Kaolins were chosen at random. These Kaolins were electodialyzed in a Mattson type dialysis cell. Titration curves were run on these both before and after being dialyzed to determine base exchange capacity and optimum pH. Debye-Scherrer x-ray powder diffraction patterns were made on each Kaolin both untreated and electrodialyzed in order to determine if electrodialysis had any effect on the crystal structure of the Kaolin. Quantitative spectrographic analyses were made to determine what elements and how much of each element was removed by dialysis. The same process was run and tests were made on Tennessee Ball Clay and Bentonite as a basis of comparison. It was confirmed that the Bentonite was decomposed by electrodialysis.