COMPOSITION OF MATTER

摘要

PCT No. PCT/GB96/01127 Sec. 371 Date Apr. 17, 1998 Sec. 102(e) Date Apr. 17, 1998 PCT Filed May 13, 1996 PCT Pub. No. WO96/36435 PCT Pub. Date Nov. 21, 1996A composition of matter is provided in which a phosphonic acid or phosphonic acid ester group is linked through a thioether residue to a silicon atom which is further covalently bonded to a solid inorganic support. The compositions can be employed to selectively separate metal ions having high cationic charge from a solution containing lower-charged cations, and also to selectively separate highly charged cations having a relatively high charge density from cations having the same charge, but a lower charge density.