申请人:Akzo Nobel N.V.
公开号:EP0662344A1
公开(公告)日:1995-07-12
Use of a porous, preferably dimensionally stable, hydrophobic polymer for the extraction of metal ions from an aqueous solution, with the polymer being in the form of a regenerative granulate or powder having an average particle diameter of 0,1 to 10 mm and pores of 0,1 to 50 µm, which is obtained by the dissolving of a polymer, with heating, at a temperature above the upper critical decomposition temperature Tc in a complexing agent containing hydrophobic liquid, followed by lowering of the temperature, resulting in a porous polymer filled with the hydrophobic liquid, and the mechanical diminution of the solidified mass. Favourable results have been attained using polypropylene as the hydrophobic polymer, bis(2,4,4-trimethylpentyl)thiophosphinic acid as the complexing agent, and with a mixture of dibenzyl toluene and/or polypropylene glycol ether being part of the hydrophobic liquid.
使用多孔的、最好是尺寸稳定的疏水聚合物从水溶液中萃取金属离子,聚合物为再生颗粒或粉末状,平均颗粒直径为 0.1 至 10 毫米,孔径为 0.1 至 50 微米、在高于上临界分解温度 Tc 的温度下,在含有疏水性液体的络合剂中加热,然后降低温度,形成充满疏水性液体的多孔聚合物,并通过机械方式使凝固体变小。使用聚丙烯作为疏水聚合物,双(2,4,4-三甲基戊基)硫代膦酸作为络合剂,并将二苄基甲苯和/或聚丙二醇醚的混合物作为疏水液体的一部分,已经取得了良好的效果。