Patent US3873633A successfully refreshed from Google Patents.
US3873633A
Expired / Lapsed
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Processes for dehydrogenation of hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1973-07-19
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Granted: 1975-03-25
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Expires: 1993-07-19
Abstract
Abstract Organic compounds are dehydrogenated to compounds having a higher degree of unsaturation by contacting the feedstock in the vapor phase in the presence of an oxygen-containing gas with a catalyst comprising cobalt, phosphorus, oxygen and, optionally, bismuth. Representative of such conversions is the oxidative dehydrogenation of butane to butadiene and isopentane to isoprene in the presence of catalyst comprising bismuth-cobalt-phosphorusoxygen and cobalt-phosphorus-oxygen, respectively. The conversion products are valuable compounds particularly useful as intermediates for the preparation of polymeric materials such as synthetic rubbers and the like.
Inventors
- 👤 Robert S Cichowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:06
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/843; B01J23/8437; B01J27/00; B01J27/14; B01J27/16; B01J27/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
A PROCESS FOR THE DEHYDROGENATION OF DEHYDROGENATABLE PARAFFINIC FEEDSTOCKS HAVING FROM 3 TO 12 CARBON ATOMS TO THE CORRESPONDING DIOLEFIN AND/OR MONO-OLEFIN WHICH COMPRISES CONTACTING SAID FEEDSTOCK IN THE VAPOR PHASE IN THE PRESENCE OF MOLECULAR OXYGEN AND IN THE ABSENCE OF HALOGEN UNDER DEHYDROGENATION CONDITIONS WITH A CATALYST CONSISTING OF BISMUTH, COBALT AND PHOSPHORUS IN ASSOCIATION WITH OXYGEN, WHEREIN THE PROPORTIONS OF BISMUTH, COBALT AND PHOSPHORUS CORRESPOND TO THE EXPRESSIONBIZCOYPZ, IN WHICH EXPRESSION THE VALUE OF X IS IN THE RANGE OF 0 TO 10, THE VALUE OF Y IS IN T RANGE OF 0.1 TO 10 AND THE VALUE OF Z IS IN THE RANGE OF 0.1 TO 5 AND WHEREIN THE FEEDSTOCK:OXYGEN RATIO IS IN THE RANGE OF ABOUT 1:1 TO ABOUT 1:4.
Claim 2
Dependent Claim
126 words
A PROCESS FOR THE DEHYDROGENATION OF DEHYDROGENATABLE PARAFFINIC FEEDSTOCKS HAVING FROM 3 TO 12 CARBON ATOMS TO THE CORRESPONDING DIOLEFIN AND/OR MONO-OLEFIN WHICH COMPRISES CONTACTING SAID FEEDSTOCK IN THE VAPOR PHASE IN THE PRESENCE OF MOLECULAR OXYGEN AND IN THE ABSENCE OF HALOGEN UNDER DEHYDROGENATION CONDITIONS WITH A CATALYST CONSISTING OF BISMUTH, COBALT AND PHOSPHORUS IN ASSOCIATION WITH OXYGEN, WHEREIN THE PROPORTIONS OF BISMUTH, COBALT AND PHOSPHORUS CORRESPOND TO THE EXPRESSIONBIZCOYPZ, IN WHICH EXPRESSION THE VALUE OF X IS IN THE RANGE OF 0 TO 10, THE VALUE OF Y IS IN T RANGE OF 0.1 TO 10 AND THE VALUE OF Z IS IN THE RANGE OF 0.1 TO 5 AND WHEREIN THE FEEDSTOCK:OXYGEN RATIO IS IN THE RANGE OF ABOUT 1:1 TO ABOUT 1:4.
Claim 3
Dependent Claim
43 words
The process of claim 1 wherein the value of x is in the range of 0.5 to 3, the value of y is in the range of 1 to 3.5 and the value of z is in the range of 0.5 to 1.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein said feedstock is butane.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein said feedstock is isopentane.
Claim 6
Dependent Claim
10 words
The process of claim 2 wherein said feedstock is butane.
Claim 7
Dependent Claim
10 words
The process of claim 2 wherein said feedstock is isopentane.
Claim 8
Dependent Claim
25 words
The process of claim 2 wherein the value of x is 1, the value of y is 3 and the value of z is 1.
Claim 9
Dependent Claim
25 words
The process of claim 2 wherein the value of x is 3, the value of y is 1 and the value of z is 1.
Claim 10
Dependent Claim
25 words
The process of claim 2 wherein the value of x is 0.5, the value of y is 3.5 and the value of z is 1.
Claim 11
Dependent Claim
25 words
The process of claim 2 wherein the value of x is 1, the value of y is 3 and the value of z is 2.
Claim 12
Dependent Claim
25 words
The process of claim 2 wherein the value of x is 0.5, the value of y is 3.5 and the value of z is 2.
Claim 13
Dependent Claim
22 words
The process of claim 1 wherein x is zero, the value of y is 3 and the value of z is 1.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |