AbstractNon‐ionic (fully esterified) phosphorylated polymers such as that from triallyl phosphate, (TAP)*, adsorb uranyl nitrate, cobaltous nitrate, lithium chloride and ferric chloride from solutions of the salts in acetone, acetone‐ether, and alcohol. The distribution coefficients betweenTAPand acetone are high (>10 to>103in favour of the polymer), and both ration and anion are equally adsorbed. The salts are probably distributed in accordance with the relative Lewis ‘basicities’ of the resin and liquid phase and the entropy changes in the system following adsorption, and they can be eluted with solvents of equal or greater basicity than (TAP), such as tributyl phosphate, dimethyl‐formamide or aqueous acetone. Adsorption takes place through Werner or addition complex formation between the functional (donor) oxygens in the resin and the metallic component of the salts, and in the case of uranyl nitrate the adsorbed complex is probably UO2(NO3)2,(TAP)2. Phosphine oxide resins have not been synthesised, but the high distributions of uranyl nitrate between tributylphosphine oxide and water is an indication that an analogous polymer would adsorb uranyl nitrate from water. Advantages of non‐ionic resins are rapid removal of cation and anion in one stage from solvents, and subsequent ease of regeneration compared with conventional ion