TITANIUM-, ZIRCONIUM- AND/OR HAFNIUM-CONTAINING ZEOLITES, A PROCESS FOR THEIR PREPARATION, AND THEIR USE

摘要

of the disclosure: The invention relates to titanium-, zirconiumand/or hafnium-containing zeolites, to a process for their preparation, and to their use. They are prepared by mixing, for example, titanium, zirconium and/or hafnium compounds with aluminum, silicon, sodium and potassium compounds and water as well as an organic ammonium compound in specified mixing ratios and heating the mixture in a sealed vessel. The zeolites are used as catalysts in the preparation of C2-C4-olefins from methanol.