Premium
Organosilicon ion‐exchange and complexing adsorbents
Author(s) -
Voronkov M.,
Vlasova N.,
Pozhidaev Yu.,
Belousova L.,
Grigoryeva O.
Publication year - 2006
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.743
Subject(s) - organosilicon , silsesquioxane , adsorption , ion exchange , hydrolysis , condensation polymer , inorganic chemistry , chemistry , thermal stability , monomer , polymer chemistry , organic chemistry , medicinal chemistry , ion , catalysis , polymer
Long and systematic investigations of the present authors in the creation of organosilicon adsorbents, ion‐exchange and complexing agents are summarized. A wide series of such adsorption materials were synthesized by hydrolytic polycondensation and oxidizing hydrolytic polycondensation of organosilicon monomers of general formula X 3 SiQY and X 3 SiQZQSiX 3 , where X = Cl, AlkO; Q = alkylene C 1 –C 3 , phenylene; Y and Z = carbofunctional ionic and complexing groups. In this way, it was possible to obtain polyorganylsilsesquioxanes with carbofunctional groups such as Y = SH, SO 3 H, S(CH 2 ) 2 NH 2 , SCH 2 COOH, NHC(O)CH 3 , NHC(S)CH 3 , NHC(NH)NH 2 , NHC(NH)NHC(NH)NH 2 , Z=S, SS, S(CH 2 ) 2 S, NHC(O)NH, NHC(S)NH, NHSSNH, NHS(O)NH, NHS(O 2 )NH, NHC(SO 2 )NH, NHC(NH)NH, NHC(S)S − · NH 3 + , etc., which turned out to be very effective ion‐exchange and complexing adsorbents. These adsorbents have a crosslinked silsesquioxane structure. The three‐dimensional structure of the polyorganylsilsesquioxane skeleton of these adsorbents provides for their high thermal and chemical stability. They are stable up to 230–270°C and do not lose their adsorption activity in 10–18 mol/l H 2 SO 4 at 100°C and in boiling concentrated HCl. The ion‐exchange and complexing properties of organosilicon adsorbents were studied on 50 elements of the Periodical system. Effective adsorbents toward noble metals, rare, rare‐earth and toxic elements have been found. The practical application of organosilicon adsorbents is described. Copyright © 2006 John Wiley & Sons, Ltd.