Milling Activation for the Solvent‐Free Synthesis of the Zeolite Mordenite (original) (raw)

Milling by a planetary mill was applied as a pretreatment of reagent mixture for the solvent-free synthesis of zeolite mordenite, and compared with both manual grinding and standard hydrothermal synthesis. The comprehensive characterization of obtained products was complemented by thorough studies of activated synthesis mixtures before crystallization steps (by Magic Angle Spinning Nuclear Magnetic Resonance and Scanning Electron Microscopy). This experimental approach gave insight into processes behind the synthesis mixture activation by milling. The characteristics of solvent-free zeolite product were comparable with material obtained by the classic hydrothermal route. The automatized milling activation made the crystallization possible due to higher energetic impact in comparison to manual grinding. The solventfree process allowed minimization of water contribution to a role of the agent catalyzing silica transformation, as a result, less than 5% of water (compared to the classical synthesis) was necessary to perform the crystallization.