稀土元素与EDTA形成配合物Ln(edta),在阴离子交换树脂的作用下,稀土元素与EDTA有明显不同的结合性。使用强碱性的凝胶和大孔径聚丙烯酸酯阴离子交换树脂:Amberlite IRA 458和Amberlite 958;以及弱碱性凝胶聚丙烯酸酯阴离子交换树脂...稀土元素与EDTA形成配合物Ln(edta),在阴离子交换树脂的作用下,稀土元素与EDTA有明显不同的结合性。使用强碱性的凝胶和大孔径聚丙烯酸酯阴离子交换树脂:Amberlite IRA 458和Amberlite 958;以及弱碱性凝胶聚丙烯酸酯阴离子交换树脂:Amberlite IRA-68对Nd^3+与EDTA形成的配合物中吸收和层析出Y^3+进行实验研究。实验表明,弱碱凝胶聚丙烯酸酯阴离子交换树脂Amberlite IRA-68比强碱凝胶聚丙烯酸酯阴离子交换树脂更有效。展开更多
A series of porous crosslinked acrylic acid copolymer beads was prepared directly by suspension polymerization of acrylic acid in the presence of 1,2 dichloroethane, toluene or heptane as the inert diluents and diviny...A series of porous crosslinked acrylic acid copolymer beads was prepared directly by suspension polymerization of acrylic acid in the presence of 1,2 dichloroethane, toluene or heptane as the inert diluents and divinylbenzene and triallyl isocyanurate as crosslinking agents. A 45% aqueous CaCl 2 solution containing 0 2% hydroxyethyl cellulose was used as the water phase. The copoly merization gave a yield more than 90% and copolymers with ion exchange capacity of 12 mmol/g were obtained. The effects of synthesis conditions,including the ratio of monomer to diluent, reaction temperture, on the resin properties were examined.展开更多
文摘A series of porous crosslinked acrylic acid copolymer beads was prepared directly by suspension polymerization of acrylic acid in the presence of 1,2 dichloroethane, toluene or heptane as the inert diluents and divinylbenzene and triallyl isocyanurate as crosslinking agents. A 45% aqueous CaCl 2 solution containing 0 2% hydroxyethyl cellulose was used as the water phase. The copoly merization gave a yield more than 90% and copolymers with ion exchange capacity of 12 mmol/g were obtained. The effects of synthesis conditions,including the ratio of monomer to diluent, reaction temperture, on the resin properties were examined.