US4172854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation process and catalyst
Assignee: Texas Petrochemicals Corp
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Filing: 1975-01-09
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Granted: 1979-10-30
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Expires: 1995-01-09
Abstract
Abstract Magnesium chromite dehydrogenation catalysts are improved by incorporation therein up to about 10% of an alkali metal.
Inventors
- 👤 Michael C. Ellis
- 👤 Harold E. Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:06
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J23/32; B01J23/34; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
In the cyclic process for the dehydrogenation organic compounds comprising contacting a hydrocarbon having 3 to 8 carbon atoms and at least one ##STR4## grouping with a catalyst to remove hydrogen from said organic compound and producing a compound having a higher degree of unsaturation than said hydrocarbon, terminating said dehydrogenation and regenerating said catalyst by contacting said catalyst uith molecular oxygen wherein the improvement comprises employing a dehydrogenation catalyst consistenting essentially of magnesium chromite having the general formula MeCr 2 O 4 wherein Me is Mg or Mg and one or more of the divalent ions of Ca, Sr, Ba, Fe, Mn, Co, Ni, Cu, Zn or Cd, provided that Mg comprises at least 50 atomic percent of said Me ions and from 2 to 8 mol percent of Li based on said magnesium chromite.
Claim 2
Dependent Claim
136 words
In the cyclic process for the dehydrogenation organic compounds comprising contacting a hydrocarbon having 3 to 8 carbon atoms and at least one ##STR4## grouping with a catalyst to remove hydrogen from said organic compound and producing a compound having a higher degree of unsaturation than said hydrocarbon, terminating said dehydrogenation and regenerating said catalyst by contacting said catalyst uith molecular oxygen wherein the improvement comprises employing a dehydrogenation catalyst consistenting essentially of magnesium chromite having the general formula MeCr 2 O 4 wherein Me is Mg or Mg and one or more of the divalent ions of Ca, Sr, Ba, Fe, Mn, Co, Ni, Cu, Zn or Cd, provided that Mg comprises at least 50 atomic percent of said Me ions and from 2 to 8 mol percent of Li based on said magnesium chromite.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein Al is present as a promoter.
Claim 4
Dependent Claim
21 words
The process according to claim 1 wherein said hydrocarbon is acyclic non-quarternary having 3 to 5 carbon atoms or ethyl benzene.
Claim 5
Dependent Claim
11 words
The process according to claim 3 wherein said hydrocarbon comprises n-butane.
Claim 6
Dependent Claim
11 words
The process according to claim 3 wherein said hydrocarbon comprises isopentane.
Claim 7
Dependent Claim
11 words
The process according to claim 3 wherein said hydrocarbon is ethylbenzene.
References Cited (Backward Citations)
US1984884A
Cited
US2205140A
Cited
US2205141A
Cited
US2209458A
Cited
US2474440A
Cited
US2943067A
Cited
US3064062A
Cited
US3522323A
Cited
US3781376A
Cited
US3767596A
Cited
US3780129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |