81.酸強度分布を制御した褐炭のイオン交換選択性の検討

抄録

In order to prepare the selective cation exchanger from brown coal, we tried to control the acidity distribution of carboxyl groups. For this purpose, the new technique that pre-exchanged brown coal was heated at 300℃ for 5h was used. By this method, only the carboxyl groups which had high affinity with pre-exchanged metal ions were kept undecomposed, and the others were thermally decomposed. In this study, acidity distribution and the cation exchange property of samples prepared in this way were examined.