Process for preparing a zeolitic material having framework type AEI

Patent metadata

Field	Value
Publication number	US-11878293-B2
Application number	US-201917274809-A
Country	US
Kind code	B2
Filing date	Sep 10, 2019
Priority date	Sep 11, 2018
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

The present disclosure relates to a process for preparing a zeolitic material having framework type AEI and having a framework structure which comprises a tetravalent element Y, a trivalent element X, and O. Further, the present disclosure relates to a zeolitic material having framework type AEI and having a framework structure which comprises a tetravalent element Y, a trivalent element X, and O, preferably obtained by the process, and further relates to the use of the zeolitic material as a catalytically active material, as a catalyst, or as a catalyst component.

First claim

The invention claimed is:

1. A process for preparing a zeolite material comprising a zeolite having an AEI framework and a framework structure comprising a tetravalent element Y, a trivalent element X, and O and a zeolite having a GME or AFI framework, the process comprising:
(i) preparing a synthesis mixture comprising water, a source of Y, a source of X, an AEI framework structure directing agent, and a source of sodium, wherein the source of Y and/or the source of X comprise sodium;
(ii) heating the synthesis mixture under autogenous pressure to a temperature ranging from 100° C. to 180° C. for at least 6 h, obtaining the zeolite material comprising the zeolite having an AEI framework and a framework structure comprising a tetravalent element Y, a trivalent element X, and O, and the zeolite having a GME or AFI framework, comprised in its mother liquor;
wherein the source of Y and the source of X contribute a total of at least 50 weight-% of elemental sodium in the synthesis mixture prepared in (i);
wherein Y is one or more of Si, Ge, S, Ti, and Zr;
wherein X is one or more of Al,
wherein the source of X comprises a sodium aluminate,
wherein in the synthesis mixture prepared in (i), the synthesis mixture is characterized by a molar ratio of the source of Y, calculated as YO 2 , relative to the source of X, calculated as X 2 O 3 , ranging from 5:1 to 25:1, a molar ratio of the source of Y, calculated as YO 2 , relative to the AEI framework structure directing agent ranging from 1:1 to 10:1, and a molar ratio of the source of Y, calculated as YO 2 , relative to the water ranging from 0.01:1 to 1:1.

2. The process of claim 1 , wherein the source of Y and the source of X contribute a total of at least 75 weight-% of elemental sodium in the synthesis mixture prepared in (i).

3. The process of claim 1 , wherein in the synthesis of mixture prepared in (i), the source of sodium is the source of X and the source of Y does not comprise sodium, or the source of sodium is the source of Y and the source of X.

4. The process of claim 1 , wherein Y comprises Si.

5. The process of claim 1 , wherein the source of Y comprises a sodium silicate having the formula (Na 2 SiO 2 ) n O wherein n is an integer.

6. The process of claim 1 , wherein in the synthesis mixture obtained from (i) in (ii), the synthesis mixture is heated to a temperature ranging from 140° C. to 160° C. or 100° C. to 140° C.

7. The process of claim 1 , further comprising
(iv) cooling the mixture obtained from (ii); and
(iv) separating the zeolite material from the obtained mixture.

8. The process of claim 7 , further comprising contacting the zeolite material with a solution comprising ammonium ions to obtain an ammonium form zeolitic material.

9. The process of claim 7 , further comprising supporting a metal M on the zeolite material, and wherein the metal M is a transition metal of groups 7 to 12 of the periodic system of elements.

10. The process of claim 9 , wherein supporting a metal M on the zeolite material comprises heating a mixture comprising the zeolite material, a source of the metal M, a solvent for the source of the metal M, and optionally an acid to a temperature ranging from 30° C. to 90° C.; and separating a zeolite material comprising the metal M from the mixture.

11. The process of claim 10 , wherein the metal M is supported on the zeolite material in an amount ranging from 1 weight-% to 11 weight-% calculated as MO and based on the total weight of the zeolitic material.

12. The process of claim 1 , wherein the zeolite having an AEI framework and a framework structure comprising a tetravalent element Y, a trivalent element X, and O is characterized by one or more of:
(1) a BET specific surface area ranging from 200 m 2 /g to 340 m 2 /g;
(2) a crystallinity of at least 60% determined by X-Ray Diffraction analysis;
(3) a Langmuir surface area ranging from 290 m 2 /g to 430 m 2 /g determined according to DIN 66131.

Assignees

• Basf Corp

Inventors

• Mcguire Robert
• Oezkirim Faruk
• Mueller Ulrich

Classifications

• C01P2006/12

  Surface area · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/86

  by NMR- or ESR-data · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• B01D2255/20761

  Copper · CPC title