Preparation of new anion exchangers based on cross-linked polystyrene, their use in the CO2 addition to oxiranes and sorption of high field strength elements
摘要
Chloromethylation of cross-linked styrene-divinylbenzene beads with subsequent quaternization with amines was carried out. The resulting anion exchangers were tested as catalysts for the addition of CO2 to oxiranes and as sorbents for the separation of Zr, Nb, Hf, Ta, and Th salts from nitric acid solutions. The anion exchanger can be used in six catalytic cycles for the reaction of CO2 addition to oxiranes, which led to cyclic carbonates in quantitative yields.