Di- and trioxacyclohexane as structure directing molecules in the synthesis of zeolites omega and ECR-1

Six-membered ring cyclohexane derivatives with 2 oxygen (1,4-dioxane or p-dioxane) and 3 (1,3,5-trioxane) atoms have been used as organic molecules in the synthesis of zeolites omega (MAZ framework type) ECR-1 (EON type). Both yield zeolite at moderate temperatures a composition aluminum distribution similar to those obtained more standard organics such tetramethylammonium cation. If preparation p-dioxane was previously known, use 1,3,5-trioxane had never reported literature. The most interesting feature is that these could be released from structure very low temperature, typically 300 °C below temperature observed p-dioxane. When alkalinity gels decreased, progressively replaced by presence but not relative proportion different solids has monitored X-ray diffraction (XRD) solid-stare nuclear magnetic resonance (NMR). 23Na NMR calcined rehydrated found particularly adapted discriminate MAZ/EON mixtures poorly resolved XRD patterns.