Patent US3789063A successfully refreshed from Google Patents.
US3789063A
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Olefin oxidation catalyst
Assignee: Dow Chemical Co
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Filing: 1972-05-08
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Granted: 1974-01-29
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Expires: 1992-05-08
Abstract
Abstract The vapor phase oxidation of isobutene to methacrolein or methacrylonitrile (when NH3 is used as a reactant) is improved when an oxide of Na, K, Rb, Cs or Ca is added as a promoter to a catalyst containing the oxides of iron, molybdenum, tellurium and at least one of the oxides of rhenium, manganese and vanadium.
Inventors
- 👤 R Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:42
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; B01J2523/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
15 words
The catalyst composition of claim 1 in which M is rhenium and Q is potassium.
Claim 2
Dependent Claim
15 words
The catalyst composition of claim 1 in which M is rhenium and Q is sodium.
Claim 3
Dependent Claim
15 words
The catalyst composition of claim 1 in which M is rhenium and Q is cesium.
Claim 4
Dependent Claim
15 words
The catalyst composition of claim 1 in which M is rhenium and Q is calcium.
Claim 5
Dependent Claim
22 words
The catalyst composition of claim 1 wherein the atomic ratio of the metals is Fe600Mo1000Te75Re, Qn, where n is 50 to 200.
Claim 6
Dependent Claim
10 words
The catalyst composition of claim 6 wherein Q is potassium.
Claim 7
Dependent Claim
26 words
The catalyst composition of claim 1 wherein M is rhenium, Q is potassium, x is 600, y is 1,000, z is 75 and n is 191.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |