This paper reports the results on experimental and
theoretical study of the new phenomenon called
ion-exchange-isothermal-supersaturation (IXISS). This effect is
observed for a number of ion-exchange
systems where frontal or reverse frontal separation is accompanied by
the formation of extremely stable
supersaturated solutions of low solubility substances in the interbed
space of ion-exchange columns. After
leaving the column a supersaturated solution crystallizes
spontaneously, which allows for designing a
practically ideal ion-exchange process where a crystalline product is
obtained directly after the ion-exchange
treatment cycle. The paper is comprised of results on experimental
investigation of IXISS of magnesium
carbonate on carboxylic resins which is observed in desorption of
Mg2+ from the resin in the Mg form with
Na2CO3 solutions or with solutions of
Na2CO3−NaHCO3 mixtures.
The physical and mathematical models
of the ion-exchange processes accompanied by the IXISS effect are
proposed and their validity is
experimentally confirmed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.