US3960975A
Expired / Lapsed
US
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Magnesium chromite dehydrogenation catalyst
Assignee: Texas Petrochemicals Corp
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Filing: 1974-06-03
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Granted: 1976-06-01
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Expires: 1994-06-03
Abstract
Abstract Magnesium chromites promoted with aluminum have been found to be superior to chromia-alumina type dehydrogenation catalysts, for example, in the dehydrogenation of n-butane. The aluminum is either added to the preformed magnesium chromite or is incorporated into the spinel structure of the chromite itself or added in both ways. The aluminum will be present in the catalyst from all sources in an atomic ratio of Al:Cr of 0.0004 to 1.2:1. The atomic ratio will more usually be 0.04 to 0.8:1, Al:Cr.
Inventors
- 👤 Harold E. Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:26
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/03; B01J37/031; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J23/32; B01J23/34; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
85 words
A catalyst for use in cyclic dehydrogenation consisting of a compound of the formula, MeAl x Cr 2-x O 4 , where 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 x is a number of from more than 0 up to less than 1 and the atomic ratio of Al:Cr is 0.04 to 0.8.
Claim 2
Dependent Claim
85 words
A catalyst for use in cyclic dehydrogenation consisting of a compound of the formula, MeAl x Cr 2-x O 4 , where 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 x is a number of from more than 0 up to less than 1 and the atomic ratio of Al:Cr is 0.04 to 0.8.
Claim 3
Dependent Claim
10 words
The catalyst according to claim 1 wherein Me is Mg.
References Cited (Backward Citations)
US2209458A
Cited
US3781376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |