US3867472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation process
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1973-07-02
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Granted: 1975-02-18
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Expires: 1993-07-02
Abstract
Abstract There is disclosed a method for the dehydrogenation of monoolefins to diolefins utilizing certain silver salts, cadmium salts and copper ferricyanide.
Inventors
- 👤 James J Tazuma
- 👤 Mario D Zadra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:21
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
58 words
A PROCESS FOR THE DEHYDROGENATION OF MONOOLEFINS TO DIOLEFINS WHICH CONSISTS ESSENTIALLY OF BRINGING SAID MONOOLEFINS INTO CONTACT WITH A CATALYST CONSISTING ESSENTIALLY OF AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF SILVER CHLORIDE, SILVER IODIDE, SILVER FLUORIDE, SILVER BROMIDE, CADMIUM CHLORIDE, CADMIUM IODIDE, CADMIUM FLUORIDE, CADMIUM BROMIDE AND COPPER FERRICYANIDE DEPOSITED ON AN ALUMINA SUPPORT.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE DEHYDROGENATION OF MONOOLEFINS TO DIOLEFINS WHICH CONSISTS ESSENTIALLY OF BRINGING SAID MONOOLEFINS INTO CONTACT WITH A CATALYST CONSISTING ESSENTIALLY OF AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF SILVER CHLORIDE, SILVER IODIDE, SILVER FLUORIDE, SILVER BROMIDE, CADMIUM CHLORIDE, CADMIUM IODIDE, CADMIUM FLUORIDE, CADMIUM BROMIDE AND COPPER FERRICYANIDE DEPOSITED ON AN ALUMINA SUPPORT.
Claim 3
Dependent Claim
18 words
A process according to claim 1 in which a temperature of from about 375*C. to 725*C. is employed.
Claim 4
Dependent Claim
23 words
A process according to claim 1 wherein the monoolefins are either straight or branched chain and contain from 4 to 8 carbon atoms.
Claim 5
Dependent Claim
27 words
A process according to claim 1 wherein the monoolefins are selected from the group consisting of cis-2-butene, cis-2-pentene, 3-methyl-2-pentene, 1-butene, 1-pentene, 2-methyl-2-butene, 2,3-dimethyl-1-butene, 2,3-dimethyl-2-butene, 2-ethyl-1-butene, and 2-methyl-1-butene.
Claim 6
Dependent Claim
27 words
A process according to claim 4 in which the catalyst contains from about ten percent to about 40 percent by weight of the salt or mixtures thereof.
Claim 7
Dependent Claim
21 words
A process according to claim 5 in which the liquid hourly space velocity (LHSV) ranges from about 0.5 to about 2.0.
Claim 8
Dependent Claim
26 words
A process according to claim 1 wherein the catalyst contains from about one percent to about 40 percent by weight of the salt or mixtures thereof.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein liquid hourly space velocity (LHSV) ranges from 0.1 to about 10.0.
References Cited (Backward Citations)
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US3308185A
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |