| 摘要 |
PURPOSE:To obtain an ion exhange resin having a great heat-regenerative exchange capacity by manufacturing a heat-regenerative ion exchange resin with a specific type of weakly acid cation exchange groups. CONSTITUTION:For heat-regenerative ion exchange resin having weakly acid cation exchange groups and weakly basic anion exchange groups in a same resin particle, the weakly acid cation exchange group has the formula as shown in Fig., and the weakly acid cation exchange resin can be manufactured by the procedure in which polyvinyl alcohol and sodium glyoxylate are reacted, bridged with a cross- linking agent, and then treated with an acid. The ion exchange resin, having a great exchange capacity difference between cold state and heated state is a heat- regenerative exchange resin. |
