Oxidative dehydrogenation catalysts

Patent metadata

Field	Value
Publication number	US-11338274-B2
Application number	US-201916528828-A
Country	US
Kind code	B2
Filing date	Aug 1, 2019
Priority date	Aug 3, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

Provided in this disclosure are oxidative dehydrogenation catalysts that include a mixed metal oxide having the empirical formula:

Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d

wherein d is a number to satisfy the valence of the oxide. The oxidative dehydrogenation catalyst is characterized by having XRD diffraction peaks (2θ degrees) at 22±0.2, 27±0.2, 28.0±0.2, and 28.3±0.1. The disclosure also provides methods of making the catalysts that include wet ball milling.

First claim

What is claimed is:

1. An oxidative dehydrogenation catalyst comprising a mixed metal oxide having the empirical formula:
Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d

wherein:
d is a number to satisfy the valence of the oxide,
the oxidative dehydrogenation catalyst is characterized by having XRD diffraction peaks (2θ degrees) at 22±0.2, 27±0.2, 28.0±0.2, and 28.3±0.1,
the oxidative dehydrogenation catalyst has a pore volume from 0.01 cm 3 /g to 0.10 cm 3 /g, and
the oxidative dehydrogenation catalyst has a surface area from 15 m 2 /g to 65 m 2 /g.

2. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst is prepared by a process comprising wet ball milling a pretreated oxidative dehydrogenation catalyst having the empirical formula:
Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d

wherein d is a number to satisfy the valence of the oxide.

3. The oxidative dehydrogenation catalyst of claim 1 , wherein the aspect ratio of the peak at 27±0.2 to the peak at 22±0.2 is 0.55:1 to 0.65:1.

4. The oxidative dehydrogenation catalyst of claim 1 , wherein the aspect ratio of the peak at 27±0.2 to the peak at 22±0.2 is about 0.60:1.

5. The oxidative dehydrogenation catalyst of claim 1 , wherein the aspect ratio of the peak at 28.3±0.1 to the peak at 27±0.2 is 0.50:1 to 0.80:1.

6. The oxidative dehydrogenation catalyst of claim 1 , wherein the aspect ratio of the peak at 28.3±0.1 to the peak at 27±0.2 is 0.60:1 to 0.70:1.

7. The oxidative dehydrogenation catalyst of claim 1 , wherein the aspect ratio of the peak at 28.3±0.1 to the peak at 27±0.2 is about 0.65:1.

8. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a pore volume of about 0.06 cm 3 /g to about 0.08 cm 3 /g.

9. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a pore volume of about 0.07 cm 3 /g.

10. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a surface area from 35 m 2 /g to 45 m 2 /g.

11. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a surface area of about 40 m 2 /g.

12. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst comprises multi-directional crystalline phases as determined by transmission electron microscopy.

13. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a 35% conversion temperature of about 335° C. to about 395° C.

14. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a 35% conversion temperature of about 355° C. to about 365° C.

15. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a selectivity to ethylene of greater than about 90%.

16. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a selectivity to ethylene of greater than about 92%.

17. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst has a selectivity to ethylene of greater than about 93.5%.

18. The oxidative dehydrogenation catalyst of claim 1 , wherein the catalyst further comprises Nb 0.5 V 0.5 O 2 .

19. An oxidative dehydrogenation catalyst comprising a mixed metal oxide having the empirical formula:
Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d

wherein:
d is a number to satisfy the valence of the oxide,
the oxidative dehydrogenation catalyst is characterized by having XRD diffraction peaks (2θ degrees) at 22±0.2, 27±0.2, 28.0±0.2, 28.2±0.1, and 28.3±0.1,
the aspect ratio of the peak at 27±0.2 to the peak at 22±0.2 is 0.50:1 to 0.70:1, the aspect ratio of the peak at 28.3±0.1 to the peak at 27±0.2 is 0.50:1 to 0.80:1, and the aspect ratio of the peak at 28.0±0.2 to the peak at 28.2±0.1 is 0.8:1 to 1.1:1,
the oxidative dehydrogenation catalyst has a 35% conversion temperature of about 335° C. to about 395° C. and a selectivity to ethylene of about 90% to about 99%,
the catalyst is prepared by a process comprising wet ball milling a pretreated oxidative dehydrogenation catalyst having the empirical formula:
Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d

wherein d is a number to satisfy the valence of the oxide,
the oxidative dehydrogenation catalyst has a pore volume from 0.01 cm 3 /g to 0.10 cm 3 /g, and
the oxidative dehydrogenation catalyst has a surface area from 15 m 2 /g to 65 m 2 /g.

20. An oxidative dehydrogenation catalyst comprising a mixed metal oxide having the empirical formula:
Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d

wherein:
d is a number to satisfy the valence of the oxide,
the oxidative dehydrogenation catalyst is characterized by having XRD diffraction peaks (2θ degrees) at 22±0.2, 27±0.2, 28.0±0.2, 28.2±0.1, and 28.3±0.1,
the aspect ratio of the peak at 27±0.2 to the peak at 22±0.2 is 0.55:1 to 0.65:1, the aspect ratio of the peak at 28.3±0.1 to the peak at 27±0.2 is 0.60:1 to 0.70:1, and the aspect ratio of the peak at 28.0±0.2 to the peak at 28.2±0.1 is 0.9:1 to 1:1,
the oxidative dehydrogenation catalyst has a 35% conversion temperature of about 355° C. to about 365° C. and a selectivity to ethylene of about 92% to about 99%,
the oxidative dehydrogenation catalyst has a pore volume from 0.01 cm 3 /g to 0.10 cm 3 /g, and
the oxidative dehydrogenation catalyst has a surface area from 15 m 2 /g to 65 m 2 /g, and
the oxidative dehydrogenation catalyst is prepared by a process comprising wet ball milling a pretreated oxidative dehydrogenation catalyst having the empirical formula:
Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d

wherein d is a number to satisfy the valence of the oxide.

Assignees

• Nova Chem Int Sa

Inventors

• Simanzhenkov Vasily
• Gao Xiaoliang
• Barnes Marie
• Sullivan David
• Kim Yoonhee
• De Wit Perry

Classifications

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J35/30

  characterised by their physical properties · CPC title

• B01J35/50

  characterised by their shape or configuration · CPC title

• B01J35/77

  Compounds characterised by their crystallite size · CPC title

• B01J35/45

  Nanoparticles · CPC title