Effect of the size of the exchangeable cations on the ion-exchange properties of heteropoly salts
TL;DR: In this paper, a comparative study of the exchange behavior of pyridinium, picolinium, lutidiniium and collidine tungstosilicate has been made.
About: This article is published in Journal of Inorganic and Nuclear Chemistry.The article was published on 1970-03-01. It has received 6 citations till now. The article focuses on the topics: Ion exchange & Salt (chemistry).
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TL;DR: A review of the developments during the period 1965-70 in use of heteropoly acid salts, ferrocyanides and synthetic zeolites as ion-exchangers.
164 citations
TL;DR: Ion exchange of the ammonium, potassium, and cesium salts of 12-tungstophosphoric and 12-molybdophoric acids has been studied at 298 K as discussed by the authors.
36 citations
TL;DR: In this article, it has been shown that the exchange reaction in the heteropoly salts is controlled by particle diffusion process in pyridinium-tungstophosphate by ammonium ion.
3 citations
TL;DR: In this article, the ion exchange behavior of pyridinium molybdoarsenate has been investigated with some uni-and bi-valent cations.
Abstract: The ion exchange behaviour of pyridinium molybdoarsenate has been investigated with some uni- and bi-valent cations. The slopes of the isotherms are widely different for various cations suggesting that separation of these ions is feasible. Barrer's equation has been applied to the exchange reaction and various thermodynamic parameters, viz. interaction energy between the ions on surface, thermodynamic equilibrium constant and free energy change for the exchange process, have been evaluated. This exchanger is found to be highly specific for Tl+ ions and can be used for its removal from mixtures of various uni- and bi-valent cations.
1 citations
TL;DR: In this article, a new heteropolyacid salt exchanger is prepared by replacing ammonium ion in ammonium 12-tungstoarsenate by a larger tertiary base cation, 2,4,6-collidinium ion, which is found more stable in water, acids and neutral salt solutions than other heteropoly acid salt exchangers.
1 citations
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TL;DR: The slopes of the isotherms are widely different suggesting that separation of these ions on a pyridinium tungstophosphate (PWP) column is feasible as mentioned in this paper.
9 citations
3 citations