The present invention relates to a process for the preparation of a zeolitic material having an AEI-type framework structure comprising SiO2 and X2O3 in its framework structure, wherein X stands for a trivalent element, wherein said process comprises: (1) preparing a mixture comprising one or more structure directing agents and a first zeolitic material comprising SiO2 and X2O3 in its framework structure, wherein the first zeolitic material has a framework structure selected from the group consisting of FER-, TON-, MTT-, FAU-, GIS-, MOR-, BEA-, MFI-, and LTA-type framework structures, including mixtures of two or more thereof; (2) heating the mixture obtained in (1) for obtaining a second zeolitic material having an AEI-type framework structure comprising SiO2 and X2O3 in its framework structure; (3) optionally calcining the second zeolitic material obtained in (2); (4) optionally subjecting the zeolitic material obtained in (2) or (3) to an ion-exchange procedure, wherein preferably one or more ionic extra-framework elements contained in the zeolite framework is ion-exchanged against H+ and/or NH4+, more preferably against NH4+; (5) calcining the zeolitic material obtained in (2), (3), or (4) at a temperature in the range of from greater than 600 to 900 °C; and wherein the atmosphere under which calcining of the zeolitic material in (5) is effected contains less than 10 vol.-% of H2O. Furthermore, the present invention relates to a zeolitic material having an AEI-type framework structure as such and as obtainable according to the inventive process, as well as to a process for the conversion of oxygenates to olefins in which they are used, respectively. Finally, the present invention relates to the use of the zeolitic material having an AEI-type framework structure according to the present invention, in particular as a catalyst.
本发明涉及一种制备具有AEI型框架结构的
沸石材料的方法,其中该框架结构包括SiO2和X2O3,在其中X代表三价元素,所述方法包括:(1)制备包含一种或多种结构定向剂和第一
沸石材料的混合物,所述第一
沸石材料在其框架结构中包含SiO2和X2O3,其中第一
沸石材料具有从FER型、TON型、M
TT型、FAU型、GIS型、MOR型、BEA型、MFI型和LTA型框架结构中选择的框架结构,包括两种或两种以上的混合物;(2)加热步骤(1)中获得的混合物,以获得具有AEI型框架结构的第二
沸石材料,其中该框架结构包括SiO2和X2O3;(3)可选地,煅烧步骤(2)中获得的第二
沸石材料;(4)可选地,将步骤(2)或(3)中获得的
沸石材料进行离子交换程序,其中优选地,
沸石框架中包含的一种或多种离子型外框架元素被离子交换为H+和/或NH4+,更优选地为NH4+;(5)将在步骤(2)、(3)或(4)中获得的
沸石材料在600至900°C的温度范围内煅烧;并且步骤(5)中煅烧
沸石材料的气氛中含
水量小于10体积%。此外,本发明涉及一种具有AEI型框架结构的
沸石材料,以及根据本发明的创新过程获得的
沸石材料,以及一种将氧化物转化为烯烃的方法,其中它们分别被使用。最后,本发明涉及根据本发明的AEI型框架结构
沸石材料的用途,特别是作为催化剂。