Patent US954944A successfully refreshed from Google Patents.
US3887631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidative dehydrogenation of hydrocarbons
Assignee: Texaco Inc
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Filing: 1973-05-14
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Granted: 1975-06-03
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Expires: 1993-05-14
Abstract
Abstract Hydrocarbons such as butene may be oxidatively dehydrogenated to eg butadiene by use of a catalyst consisting essentially of oxides of molybdenum, cobalt, and boron.
Inventors
- 👤 Roberta Yaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:52
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
The method of preparing butadiene from butene which comprises contacting said butene in vapor phase in the presence of oxygen with a catalyst consisting essentially of a CoO. b MoO3 . c B2O3 wherein a is 0.75-1.25, b is 0.75-1.25, and c is 0.8-2; maintaining said butene in contact with said catalyst for 0.5-7 seconds at 440*C-510*C thereby forming effluent gas containing butadiene; and recovering said effluent gas containing said butadiene.
Claim 2
Independent Claim
71 words
The method of preparing butadiene from butene which comprises contacting said butene in vapor phase in the presence of oxygen with a catalyst consisting essentially of a CoO. b MoO3 . c B2O3 wherein a is 0.75-1.25, b is 0.75-1.25, and c is 0.8-2; maintaining said butene in contact with said catalyst for 0.5-7 seconds at 440*C-510*C thereby forming effluent gas containing butadiene; and recovering said effluent gas containing said butadiene.
Claim 3
Independent Claim
25 words
THE METHOD OF PREPARING BUTADIENE FROM BUTENE WHICH COMPRISES CONTACTING SAID BUTENE IN VAPOR PHASE IN THE PRESENCE OF OXYGEN WITH CATALYST CONSISTING ESSENTIALLY OF
Claim 4
Independent Claim
25 words
THE METHOD OF PREPARING BUTADIENE FROM BUTENE WHICH COMPRISES CONTACTING SAID BUTENE IN VAPOR PHASE IN THE PRESENCE OF OXYGEN WITH CATALYST CONSISTING ESSENTIALLY OF
Claim 5
Dependent Claim
19 words
The method of preparing butadiene as claimed in claim 1 wherein said catalyst is CoO. MoO3 . 0.8-2 B2O3.
Claim 6
Dependent Claim
30 words
The method of preparing butadiene from butene as claimed in claim 1 wherein said charge butene is admitted to the catalyst at a volume hourly space velocity VHSV of 500-8000.
Claim 7
Dependent Claim
26 words
The method of preparing butadiene from butene as claimed in claim 1 wherein said charge butene is admitted to the catalyst at a VHSV of 1000-4000.
Claim 8
Dependent Claim
24 words
The method of preparing butadiene from butene as claimed in claim 1 wherein said charge butene is contacted with said catalyst for 1.1-2.8 seconds.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |