The invention has composition of matter and process aspects. The composition of matter aspect relates to compounds selected from the class consisting of
and
The process aspect involves the use of these compounds to complex with and separate a desired selected ion from a multiple ion solution, breaking the complex to free the desired ion and recovering the freed desired ion. This process can be carried out in these ways: (A) as ligands in a liquid membrane phase for selectively and competitively separating desired metal ions from mixtures with other ions in a separate source phase and transporting these ions to a separate receiving phase, with both of which the liquid membrane phase is in interfacial contact long enough to effect substantial removal of the desired ions from the source phase and transporting them to the receiving phase from which they are recovered, (B) as covalently bonded to silica gel supported in a column through which the multiple ion solution is first flowed, followed by receiving liquid, and (C) as ligand in an organic liquid filling pores or apertures in the wall of a hollow fiber in a bundle of hollow fibers on opposite sides of which flow the multiple ion solution and the receiving liquid.
本发明包括物质组成和工艺两个方面。物质组成方面涉及选自以下类别的化合物
和
工艺方面涉及使用这些化合物与多离子溶液中的所选离子络合和分离,破坏络合物以游离所选离子,并回收游离出的所选离子。这一过程可以通过以下方式进行:(A) 作为液膜相中的
配体,选择性地、竞争性地将所需
金属离子从与其他离子的混合物中分离出来,并将这些离子输送到一个单独的接收相中,液膜相与这两个接收相的界面接触时间足够长,从而将所需离子从源相中大量分离出来,并输送到接收相中回收、(C) 作为有机液体中的
配体,填充在中空纤维束壁的孔隙中,中空纤维束的两侧分别流淌着多离子溶液和接收液。