Process for the flash calcination of a zeolitic material

Patent metadata

Field	Value
Publication number	US-10995008-B2
Application number	US-201716086251-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Mar 30, 2016
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A process for the calcination of a zeolitic material, wherein the process contains the steps of (i) providing a zeolitic material containing YO 2 and optionally further containing X 2 O 3 in its framework structure in the form of a powder and/or of a suspension of the zeolitic material in a liquid, wherein Y stands for a tetravalent element and X stands for a trivalent element; (ii) atomization of the powder and/or of the suspension of the zeolitic material provided in (i) in a gas stream for obtaining an aerosol; and (iii) calcination of the aerosol obtained in (ii) for obtaining a calcined powder, a zeolitic material obtained by the above process, and its use as a molecular sieve, as an adsorbent, for ion-exchange, as a catalyst, and/or as a catalyst support.

First claim

The invention claimed is:

1. A process for calcining a zeolitic material, the process comprising:
(i) providing a zeolitic material comprising YO 2 and X 2 O 3 in its framework structure in a form of a powder and/or of a suspension of the zeolitic material in a liquid, wherein Y is a tetravalent element and X is a trivalent element;
(ii) atomizing the powder and/or of the suspension of the zeolitic material in a gas stream for obtaining an aerosol; and
(iii) calcining the aerosol, thereby obtaining a calcined powder,
wherein X is Al.

2. The process of claim 1 , wherein the providing comprises:
(i.a) preparing a mixture comprising a source for YO 2 and a solvent system, wherein the mixture optionally further comprises a source for X 2 O 3 ; and
(i.b) crystallizing the mixture for obtaining a suspension of a zeolitic material in a mother liquor as the suspension of the zeolitic material in a liquid.

3. The process of claim 2 , wherein the providing further comprises:
(i.c) separating the zeolitic material from the mother liquor;
(i.d) optionally washing the zeolitic material obtained in (i.b) and/or (i.c) with at least one solvent; and
(i.e) optionally drying the zeolitic material obtained in (i.b), (i.c) and/or (i.d).

4. The process of claim 3 , wherein the providing further comprises:
(i.f) providing a solvent system; and
(i.g) suspending the zeolitic material in the form of a powder as obtained according to (i.c), (i.d) and/or (i.e) in the solvent system.

5. The process of claim 4 , wherein the solvent system comprises water and/or at least one organic solvent.

6. The process of claim 2 , wherein the zeolitic material in the mother liquor is spray-dried.

7. The process of claim 2 , wherein the mixture further comprises an organotemplate.

8. The process of claim 2 , wherein the solvent system comprises water and/or at least one organic solvent.

9. The process of claim 1 , wherein Y is at least one selected from the group consisting of Si, Sn, Ti, Zr, and Ge.

10. The process of claim 1 , wherein an average particle size D50 of powder particles and/or of droplets from the suspension in the aerosol as determined according to ISO 13320:2009 is from 0.5 to 500 μm.

11. The process of claim 1 , wherein the calcining is performed for from 5 ms to 30 s.

12. The process of claim 1 , wherein the calcining is conducted in an oxygen containing atmosphere.

13. A zeolitic material obtained according to the process of claim 1 .

14. The zeolitic material of claim 13 , wherein an average particle size D50 of the zeolitic material determined according to ISO 13320:2009 is from 0.5 to 500 μm.

Assignees

• Basf Se

Inventors

• Kalo Benedikt
• Geiger Thomas
• Koenig Rene
• Mueller Ulrich
• Maurer Stefan

Classifications

• B01D71/0281

  Zeolites · CPC title

• C01B39/48

  using at least one organic template directing agent · CPC title

• C01B39/026 Primary

  After-treatment · CPC title

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J37/0236

  Drying, e.g. preparing a suspension, adding a soluble salt and drying · CPC title