title: NEW SELECTIVE SORBENTS FOR THE EXTRACTION OF ALKALI METAL IONS
abstract: Macromolecules with crown ether groups represent a fundamentally new type of sorbents whose active centers are ligands that retain electroneutrality during simultaneous binding of cations, anions or organic compounds. The aim of this work is to study the conditions for the preparation of polymeric sorbents containing diaminodicyclohexyl crown-ethers and to investigate the activity of these sorbents with respect to the extraction of alkali metal cations. Chemical grafting of cycloaliphatic crown 
journal: SERIES CHEMISTRY AND TECHNOLOGY