US4232174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and dehydrogenation process
Assignee: EIDP Inc
•
Filing: 1979-03-28
•
Granted: 1980-11-04
•
Expires: 1999-03-28
Abstract
Abstract A catalyst containing alkali metal, chromium, iron, lead, phosphorus and oxygen, and a process for the preparation of unsaturated lower aliphatic acids and esters of such acids by catalytic oxidative dehydrogenation of the corresponding saturated acids and esters using the catalyst.
Inventors
- 👤 Robert J. Statz
- 👤 James K. Doty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:55
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/377
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
In the process for the oxidative dehydrogenation of a saturated compound of the general formula: ##STR2## wherein each of R 1 , R 2 , R 3 and R 4 is selected from hydrogen and lower alkyl groups containing 1-4 carbon atoms, by heating the compound in the presence of a catalyst and oxygen to yield the corresponding unsaturated compound, the improvement which comprises heating the compound in the presence of a catalyst of the general formula: Me.sub.a Cr.sub.b FePb.sub.c P.sub.d O.sub.e wherein Me is an alkali metal selected from the group consisting of lithium, sodium, potassium, rubidium, and cesium, a is about from 0.01 to 0.3, b is about from 0.05 to 0.4, c is about from 0.6 to 1.0, d is about from 1.0 to 6.0 and e is sufficient to provide oxygen to satisfy the oxidative states of the remaining components.
Claim 2
Dependent Claim
144 words
In the process for the oxidative dehydrogenation of a saturated compound of the general formula: ##STR2## wherein each of R 1 , R 2 , R 3 and R 4 is selected from hydrogen and lower alkyl groups containing 1-4 carbon atoms, by heating the compound in the presence of a catalyst and oxygen to yield the corresponding unsaturated compound, the improvement which comprises heating the compound in the presence of a catalyst of the general formula: Me.sub.a Cr.sub.b FePb.sub.c P.sub.d O.sub.e wherein Me is an alkali metal selected from the group consisting of lithium, sodium, potassium, rubidium, and cesium, a is about from 0.01 to 0.3, b is about from 0.05 to 0.4, c is about from 0.6 to 1.0, d is about from 1.0 to 6.0 and e is sufficient to provide oxygen to satisfy the oxidative states of the remaining components.
Claim 3
Dependent Claim
17 words
A process of claim 1 wherein the alkali metal of the catalyst is potassium, sodium or cesium.
Claim 4
Dependent Claim
15 words
A process of claim 1 wherein the catalyst further comprises a support of colloidal silica.
Claim 5
Dependent Claim
12 words
A process of claim 1 wherein the saturated compound is isobutyric acid.
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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |