Macrocyclic ligands bonded to silica or silica gel and their use in selectively and quantitatively removing and concentrating ions present at low concentrations from mixtures thereof with other ions.

摘要

The invention has composition of matter and process aspects. The composition of matter aspect relates to certain macrocyclic compounds bonded to silica or silica gel. The process aspect involves the use of any of these compositions of matter packed in a column through which a solution of the multiple ions is flowed to complex with the macrocyclic compound and separate a desired selected ion from a multiple ion solution, breaking the complex by flowing a receiving liquid through the column to free the desired ion and recovering the freed desired ion from the receiving liquid.