Rare earth element containing aluminum-rich zeolitic material
The present invention relates to a rare earth element containing zeolitic material having a framework structure selected from the group consisting of AEI, AFT, AFV, AFX, AVL, CHA, EMT, GME, KFI, LEV, LTN, and SFW, including mixtures of two or more thereof, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 , wherein X stands for a trivalent element, wherein the zeolitic material displays an SiO 2 :X 2 O molar ratio in the range of from 2 to 20, and wherein the zeolitic material contains one or more rare earth elements as counter-ions at the ion exchange sites of the framework structure. Furthermore, the present invention relates to a process for the production of the inventive rare earth element containing zeolitic material as well as to the use of the inventive rare earth element containing zeolitic material.
1. 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 SiO 2 and X 2 O 3 , wherein X is a trivalent element,
wherein the zeolitic material has a molar ratio of SiO 2 to X 2 O 3 in a range of from 2 to 20, and
wherein the zeolitic material comprises one or more rare earth elements RE as counter-ions at ion exchange sites of the framework structure;
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.
2. The zeolitic material of claim 1 , wherein X is selected from the group consisting of Al, B, In, Ga, and combinations of two or more thereof.
3. The zeolitic material of claim 1 , wherein an effective ionic radius of the one or more rare earth elements RE is 1.3 angstroms or less.
4. The zeolitic material of claim 1 , wherein the one or more rare earth elements RE are comprised in the zeolitic material in an amount in a range of from 0.1 to 7 wt.-% based on 100 wt.-% of SiO 2 comprised in the zeolitic material.
5. The zeolitic material of claim 1 , wherein a molar ratio, RE:X 2 O 3 , of the one or more rare earth elements RE calculated as the respective elements to X 203 comprised in the zeolitic material is in a range of from 0.01 to 0.3.
6. The zeolitic material of claim 1 , wherein the zeolitic material further comprises one or more transition metal elements M selected from the group consisting of Cr, Fe, Co, Ni, Cu, Zn, Pd, Pt, and combinations of two or more thereof, as counter-ions at ion exchange sites of the framework structure.
7. The zeolitic material of claim 6 , wherein the one or more transition metal elements M are comprised in the zeolitic material in an amount in a range of from 0.5 to 10 wt.-% based on 100 wt.-% of SiO 2 comprised in the zeolitic material.
8. The zeolitic material of claim 6 , wherein a molar ratio, M:X 2 O 3 , of the one or more transition metal elements M calculated as the respective elements to X 2 O 3 contained in the zeolitic material is in a range of from 0.01 to 1.5.
9. The zeolitic material of claim 1 , wherein the framework structure comprises a CHA-type framework structure and the zeolitic material comprises one or more selected from the group consisting of (Ni(deta) 2 )-UT-6, Chabazite, |Li-Nal|[Al-Si-O]-CHA, DAF-5, LZ-218, Linde D, Linde R, MeAPSO-47, Phi, SAPO-34, SAPO-47, SSZ-13, SSZ-62, UiO-21, Willhendersonite, ZK-14, ZYT-6, and mixtures of two or more thereof.
10. The zeolitic material of claim 1 , wherein the zeolitic material is prepared by an organotemplate-free synthetic procedure.
11. The zeolitic material of claim 1 , wherein the zeolitic material comprises one or more selected from the group consisting of SSZ-39, SAPO-18, SIZ-8, and mixtures of two or more thereof.
12. The zeolitic material of claim 1 , wherein the zeolitic material is in a form chosen from a molecular sieve, an adsorbent, a catalyst or a precursor thereof, and/or a catalyst support or a precursor thereof.
13. 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 SiO 2 and X 2 O 3 , 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 SiO 2 and X 2 O 3 and the zeolitic material having a molar ratio of SiO 2 to X 2 O 3 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 NH 4 + ; 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.
14. A zeolitic material, prepared according to the process of claim 13 .