US4476344A
Expired / Lapsed
US
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Oxidative dehydrogenation of paraffins
Assignee: Phillips Petroleum Co
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Filing: 1983-10-14
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Granted: 1984-10-09
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Expires: 2003-10-14
Abstract
Abstract An oxidative dehydrogenation process for a paraffin or mixture of paraffins having from 2 to 5 carbon atoms employing a catalyst composition comprising lithium, titanium and a promoter selected from the group consisting of molybdenum, tin and antimony.
Inventors
- 👤 James B. Kimble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:39
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/14; B01J23/16; B01J23/18; B01J23/24; B01J23/28; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
A process for the catalytic oxidative dehydrogenation of a paraffin having from 2 to 5 carbon atoms comprising the step of contacting said paraffin under suitable oxidative dehydrogenation conditions with a catalyst composition comprising lithium, titanium and a promoter selected from the group consisting of molybdenum, tin and antimony, wherein the atomic ratio of lithium to titanium is above about 1.8:1.
Claim 2
Dependent Claim
61 words
A process for the catalytic oxidative dehydrogenation of a paraffin having from 2 to 5 carbon atoms comprising the step of contacting said paraffin under suitable oxidative dehydrogenation conditions with a catalyst composition comprising lithium, titanium and a promoter selected from the group consisting of molybdenum, tin and antimony, wherein the atomic ratio of lithium to titanium is above about 1.8:1.
Claim 3
Dependent Claim
67 words
A process in accordance with claim 1 wherein the atomic ratio of lithium to titanium in said catalyst composition is in the range of about 2:1 to about 3:1 and wherein the concentration of said promoter in said catalyst composition is in the range of about 1 weight percent to about 10 weight percent calculated as the element and based on the weight of said catalyst composition.
Claim 4
Dependent Claim
87 words
A process in accordance with claim 2 wherein air is utilized to supply oxygen for said oxidative dehydrogenation and wherein said suitable oxidative dehydrogenation conditions comprise a temperature in the range of about 480° C. to about 815° C., a pressure in the range of about 10 to about 520 kilopascals, a flow rate of a feedstream containing said paraffin in the range of about 100 to about 2500 GHSV and a flow rate of said air in the range of about 1000 to about 5000 GHSV.
Claim 5
Dependent Claim
70 words
A process in accordance with claim 3 wherein said suitable oxidative dehydrogenation conditions comprise a temperature in the range of about 480° C. to about 815° C., a pressure in the range of about 100 to about 200 kilopascals, a flow rate of a feedstream containing said paraffin in the range of about 500 GHSV to about 600 GHSV and a flow rate of said air of about 1800 GHSV.
Claim 6
Dependent Claim
12 words
A process in accordance with claim 2 wherein said paraffin is ethane.
Claim 7
Dependent Claim
74 words
A process in accordance with claim 5 wherein air is utilized to supply oxygen for said oxidative dehydrogenation and wherein said suitable oxidative dehydrogenation conditions comprise a temperature in the range of about 620° C. to about 705° C., a pressure in the range of about 100 to about 200 kilopascals, a flow rate of a feedstream containing ethane of about 500 GHSV and a flow rate of said air of about 1800 GHSV.
Claim 8
Dependent Claim
48 words
A process in accordance with claim 2 wherein the catalytic oxidative dehydrogenation of said paraffin is carried out in a cyclic process comprising a dehydrogenation reaction time and a regeneration time, wherein said dehydrogenation reaction time is in the range of about 1 second to about 24 hours.
Claim 9
Dependent Claim
48 words
A process in accordance with claim 2 wherein the catalytic oxidative dehydrogenation of said paraffin is carried out in a cyclic process comprising a dehydrogenation reaction time and a regeneration time, wherein said dehydrogenation reaction time is in the range of about 1 second to about 10 minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |