Siliconizing as a method for the production of acid-resistant modifications of faujasite

Adsorption of sulfur dioxide on natural clinoptilolite chemically modified with salt solutions

“…These orders are useful as they allow to predict the zeolites behaviour at competitive ion exchange. The order of the cations is defined on the basis of the ion radii of the exchangeable cations [30,31], of the specific hydration energy [33], the presence of impurities, etc. Important criteria are zeolite electronegativity (determined by the Si/Al ratio), as well as the cation charge [22,29,34].…”