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US4410752A
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Process for the oxydehydrogenation of ethane to ethylene
Assignee: Standard Oil Co
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Filing: 1982-02-05
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Granted: 1983-10-18
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Expires: 2002-02-05
Abstract
Abstract The invention herein is directed toward a process for the oxydehydrogenation of ethane in fixed-bed or fluid-bed reactors at temperatures of less than about 600° C. The process includes the step of contacting ethane and an oxygen-containing gas with a catalyst composition having the formula V 1 .0 P a O x . The catalyst can be employed in supported or unsupported form. A promoter metal can optionally be present in the catalyst.
Inventors
- 👤 Patricia R. Blum
- 👤 Ernest C. Milberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:35
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/002; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; B01J2523/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A process for the oxydehydrogenation of ethane comprising the step of: contacting ethane and an oxygen-containing gas at a temperature of at least 300° C. with a catalyst composition having the formula V 1 .0 P a M b O x wherein M is a promoter element selected from the group consisting of Co, Cu, Fe, Ni, Nb, Mo, Cr, W, U, Ta, Ti, Zr, Zn, Hf, Mn, Pt, Pd, Sn, Sb, Bi, Ce, As, Ag and Au; a is 0.5 to 3.0; b is 0.0 to 1.0 and x is the value which satisfies the valence requirements of all the elements, said catalyst having a crystalline structure represented substantially by the X-ray diffraction pattern ______________________________________
d(A) I
______________________________________
6.3 Weak
4.8 Weak
3.9 Strong
3.13 Strong
2.93 Moderate
2.65 Weak.
______________________________________
Claim 2
Dependent Claim
132 words
A process for the oxydehydrogenation of ethane comprising the step of: contacting ethane and an oxygen-containing gas at a temperature of at least 300° C. with a catalyst composition having the formula V 1 .0 P a M b O x wherein M is a promoter element selected from the group consisting of Co, Cu, Fe, Ni, Nb, Mo, Cr, W, U, Ta, Ti, Zr, Zn, Hf, Mn, Pt, Pd, Sn, Sb, Bi, Ce, As, Ag and Au; a is 0.5 to 3.0; b is 0.0 to 1.0 and x is the value which satisfies the valence requirements of all the elements, said catalyst having a crystalline structure represented substantially by the X-ray diffraction pattern ______________________________________
d(A) I
______________________________________
6.3 Weak
4.8 Weak
3.9 Strong
3.13 Strong
2.93 Moderate
2.65 Weak.
______________________________________
Claim 3
Dependent Claim
33 words
A process, as set forth in claim 1, wherein said step of contacting ethane is conducted in a fixed bed reactor at a temperature of from about 300° C. to about 600° C.
Claim 4
Dependent Claim
27 words
A process, as set forth in claim 1, wherein said oxygen-containing gas is selected from the group consisting of air, oxygen in air and oxygen in nitrogen.
Claim 5
Dependent Claim
24 words
A process, as set forth in claim 3, wherein the ratio of air to ethane is from about 2.5:1 to about 30:1 by volume.
Claim 6
Dependent Claim
23 words
A process, as set forth in claim 1, wherein the promoter element is selected from the group consisting of Co, U and W.
Claim 7
Dependent Claim
22 words
A process, as set forth in claims 1 or 5, wherein a is 0.85 to 2.0 and b is 0.0 to 0.4.
Claim 8
Dependent Claim
40 words
A process, as set forth in claim 6, wherein the crystalline structure of said catalyst is represented substantially by the X-ray diffraction pattern ______________________________________
d(A) I
______________________________________
6.3 10
4.8 7
3.9 100
3.13 58
2.93 29
2.65 7
______________________________________
Claim 9
Dependent Claim
24 words
A process, as set forth in claim 6, wherein the composition of said catalyst is V 1 .0 P 1 .0 O x .
Claim 10
Dependent Claim
27 words
A process, as set forth in claim 6, wherein the composition of said catalyst is V 1 .0 P 1 .15 U 0 .2 O x .
Claim 11
Dependent Claim
31 words
A process, as set forth in claim 6, wherein the composition of said catalyst is V 1 .0 P 1 .15 U 0 .2 W 0 .05 +W 0 .166 °.
Claim 12
Dependent Claim
27 words
A process, as set forth in claim 6, wherein the composition of said catalyst is V 1 .0 P 1 .15 W 0 .2 O x .
Claim 13
Dependent Claim
27 words
A process, as set forth in claim 6, wherein the composition of said catalyst is V 1 .0 P 1 .14 Co 0 .19 O x .
References Cited (Backward Citations)
US3851881A
Cited
US4172084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |