Abstract
Separation of potassium and sodium by polyamide crown resin which had the selectivity towardpotassium was investigated. The adsorption quantity and selectivity of this resin were influencedby concentration and composition of the salt solution, temperature, counterion, and acid. Thelower the concentration or the higher the temperature, the smaller the adsorption quantity. Theinfluence of counterion and acid is great and the adsorption quantity becomes lower by the additionof H3PO4.
For the break through curve of this polymer, the separation of potassium and sodium becomesexcellent on lowering flow rate. The separation of potassium and sodium in artificial sea water isalso satisfactory.H3PO4 solution as well as hot pure water is effective to regenerate this polymer.
