ZEOLITIC MATERIALS OF LEV-TYPE STRUCTURE AND METHODS FOR THEIR PRODUCTION

摘要

Described is a process for the production of a zeolitic material having an LEV-type framework structure comprising YO2 and optionally comprising X2O3, wherein said process comprises: (1) preparing a mixture comprising one or more sources for YO2, one or more solvents, and optionally comprising seed crystals; and (2) crystallizing the mixture obtained in step (1); wherein Y is a tetravalent element, and X is a trivalent element, wherein the zeolitic material optionally comprises one or more alkali metals M, wherein the molar ratio of the total amount of the one or more solvents to the total amount of the one or more sources for YO2 based on YO2 is 9.5 or less, and wherein for crystallization temperatures of 175° C. or higher in step (2), the duration of crystallization at those temperatures is less than 14 d, as well as to a zeolitic material, preferably being obtainable or obtained according to the inventive process, said zeolitic material having an LEV-type framework structure comprising YO2 and X2O3, wherein the zeolitic material optionally comprises one or more alkali metals M, and wherein the zeolitic material displays an Y:X atomic ratio of from 1 to 9.4.