Rare earth element containing aluminum-rich zeolitic material

A process of producing a zeolitic material having a framework structure selected from the group consisting of AEI, AFT, AFV, AFX, AVL, CHA, EMT, GME, KFI, LEV, LTN, SFW, and mixtures of two or more thereof, the framework structure comprising SiO2 and X2O3, wherein X is a trivalent element, the process comprising:

• (1) providing a zeolitic material having a framework structure selected from the group consisting of AEI, AFT, AFV, AFX, AVL, CHA, EMT, GME, KFI, LEV, LTN, SFW, and mixtures of two or more thereof, the framework structure comprising SiO2 and X2O3 and the zeolitic material having a molar ratio of SiO2 to X2O3 in a range of from 2 to 20;
• (2) optionally subjecting the zeolitic material provided in (1) to one or more ion exchange procedures with H+ and/or NH4+;
• and
• (3) subjecting the zeolitic material provided in (1) or obtained in (2) to one or more ion exchange procedures with one or more rare earth elements;
• wherein the one or more rare earth elements RE are selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Sc, and combinations of two or more thereof.