# US 11,077,430 B2 · Oxidative dehydrogenation catalyst

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- Number: US 11,077,430 B2
- Document ID: US11077430B2
- Status: Granted
- Kind: B2
- Application number: 16/879,976
- Filed: 2020-05-21
- Published: 2020-09-10
- Granted: 2021-08-03
- Earliest claimed: 2015-08-20
- Assignees: NOVA Chemicals (International) S.A.
- Applicants: NOVA Chemicals (International) S.A.
- Inventors: Vasily Simanzhenkov; Xiaoliang Gao; David Sullivan; Hanna Drag; Leonid Modestovich Kustov; Aleksey Victorovich Kucherov; Elena Dmitrievna Finashina
- Web page: https://patentgrep.com/patent/US11077430B2

## CPC

- B01J 27/0576: {Tellurium; Compounds thereof}
- B01J 23/002: {Mixed oxides other than spinels, e.g. perovskite}
- B01J 23/28: Molybdenum
- B01J 35/32: Bulk density
- B01J 35/70: characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00)
- B01J 37/009: {Preparation by separation, e.g. by filtration, decantation, screening}
- B01J 37/03: Precipitation; Co-precipitation
- B01J 37/06: Washing {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/10: in the presence of water, e.g. steam
- B01J 37/12: Oxidising
- C07C 5/48: with oxygen as an acceptor
- B01J 2235/15: X-ray diffraction
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- C01P 2002/70: defined by measured X-ray, neutron or electron diffraction data
- C01P 2006/10: Solid density
- C01P 2006/90: Other properties not specified above
- C07C 2523/20: Vanadium, niobium or tantalum
- C07C 2523/22: Vanadium
- C07C 2523/28: Molybdenum
- C07C 2527/057: Selenium or tellurium; Compounds thereof
- Y02P 20/52: using catalysts, e.g. selective catalysts
- Y02P 20/584: Recycling of catalysts
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Oxidative dehydrogenation catalysts comprising MoVNbTeO having improved consistency of composition and a 25% conversion of ethylene at less than 420° C. and a selectivity to ethylene above 95% are prepared by treating the catalyst precursor with H2O2 in an amount equivalent to 0.30-2.8 mL H2O2 of a 30% solution per gram of catalyst precursor prior to calcining.

## Claims

### Claim 1

A method for the oxidative dehydrogenation of a mixed feed comprising ethane and oxygen in a volume ratio from 70:30 to 95:5, wherein the method comprises passing the mixed feed over a calcined oxidative dehydrogenation catalyst of the empirical formula:
Mo1.0V0.22-0.33Te0.10-0.16Nb0.15-0.19Od
wherein d is a number to satisfy the valence of the oxide and the empirical formula is determined by PIXE; and
wherein the calcined oxidative dehydrogenation catalyst is formed from a catalyst precursor that is treated with H2O2 and wherein the catalyst precursor is calcined at a temperature from 200° C. to 600° C.

### Claim 2 (depends on 1)

The method of claim 1, wherein the gas hourly space velocity greater than 3000 hr−1.

### Claim 3 (depends on 1)

The method of claim 1, wherein the temperature is less than 400° C.

### Claim 4 (depends on 1)

The method of claim 1, wherein the calcined oxidative dehydrogenation catalyst forms a fixed bed in the reactor.

### Claim 5 (depends on 1)

The method of claim 1, wherein the gas hourly space velocity is not less than 3000 hr−1, the calcined oxidative dehydrogenation catalyst forms a fixed bed in the reactor, and the selectivity to ethylene is not less than 90%.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the calcined oxidative dehydrogenation catalyst has the empirical formula:
Mo1.0V0.22-0.29Te0.10-0.16Nb0.15-0.19Od
wherein d is a number to satisfy the valence of the oxide and the empirical formula is determined by PIXE.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the calcined oxidative dehydrogenation catalyst has the empirical formula:
Mo1.0V0.22-0.29Te0.11-0.15Nb0.15-0.19Od
wherein d is a number to satisfy the valence of the oxide and the empirical formula is determined by PIXE.

### Claim 8 (depends on 1)

The method of claim 1, wherein the calcined oxidative dehydrogenation catalyst has a bulk density from 1.20 g/cc to 1.53 g/cc.

### Claim 9 (depends on 1)

The method of claim 1, wherein, in the crystalline phase of the calcined oxidative dehydrogenation catalyst, the amount of the phase having the formula
(TeO)0.39(Mo3.52V1.06Nb0.42)O14 is above 75 wt. % of the measured crystalline phase as determined by XRD.

### Claim 10 (depends on 1)

The method of claim 1, wherein, in the crystalline phase of the calcined oxidative dehydrogenation catalyst, the amount of the phase having the formula
(TeO)0.39(Mo3.52V1.06Nb0.42)O14 is above 85 wt. % of measured crystalline phase as determined by XRD.