COMPOSITION AND METHOD FOR ISOLATION, SEPARATION AND CONCENTRATION OF DESIRED IONS OF SOLUTIONS Russian patent published in 1998 - IPC

FIELD: thiol and/or thioether- aralkyl nitrogen-containing hydrocarbons being covalently bound with inorganic solid carriers. SUBSTANCE: origin solution is brought into contact with composition which comprises thiol and/or thioether aralkyl nitrogen-containing ligand together with solid carrier. Said carrier has formula (given in specification) wherein A and B are NR, N(R) CH₂S and SCH₂D, D is S and SCH₂, E is SH and H, R is aralkyl, R₂ is H, SH, OH, lower alkyl and aralkyl, c=1-10, d=0-10, e=0-10, X is (CH₂)_a(OCH₂CHR¹CH₂) or aralkyl, Y and Z are Cl, Br, J, alkyl, alkoxy, substituted alkyl or substituted alkoxy group; its matrix being chosen of group comprising sand, silica gel, glass, glass fiber, alumina, titanium dioxide, zirconium dioxide, nickel oxide or other hydrophylic inorganic carriers and mixtures thereof. Proposed composition binds desired ions into complex. Origin solution is removed away from contact. Composition comprising desired ions being bound with it and thus producing complex is brought into contact with receiving solution. Desired ions in their concentrated state are then extracted. EFFECT: increased selectivity of extraction. 35 cl