US3904703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation process
Assignee: El Paso Products Co
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Filing: 1973-04-09
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Granted: 1975-09-09
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Expires: 1993-04-09
Abstract
Abstract A novel reactor system and method for conducting dehydrogenation/oxidation reactions such as the dehydrogenation of hydrocarbons to form olefins and/or diolefins, comprising contacting the feed to be reacted in a sequence involving a dehydrogenation catalyst in a first zone, an oxidation or reducible catalyst in a second zone and with an adsorbent in a third zone, said zones being in a single reactor or series of reactors.
Inventors
- 👤 Ching-Tsan Lo
- 👤 Joe Jed Miller
- 👤 Norbert Francis Cywinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:52
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
43 words
IN A METHOD FOR CONDUCTING A DEHYDROGENATION REACTION INVOLVING CONTACT OF A HYDROCARBON FEEDSTOCK WITH SEQUENCES OF DEHYDROGENATION CATALYST AND REDUCIBLE OXIDATION CATALYST IN MUTUALLY EXCLUSIVE ZONES THE IMPROVEMENT WHICH COMPRISES SEPARATING ADJACENT SEQUENCES OF CATALTST ZOBES WITH A ZONE OF STEAM ABSORBENT.
Claim 2
Dependent Claim
43 words
IN A METHOD FOR CONDUCTING A DEHYDROGENATION REACTION INVOLVING CONTACT OF A HYDROCARBON FEEDSTOCK WITH SEQUENCES OF DEHYDROGENATION CATALYST AND REDUCIBLE OXIDATION CATALYST IN MUTUALLY EXCLUSIVE ZONES THE IMPROVEMENT WHICH COMPRISES SEPARATING ADJACENT SEQUENCES OF CATALTST ZOBES WITH A ZONE OF STEAM ABSORBENT.
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein the feedstock is a hydrocarbon containing at least one aliphatic chain of about 2 to 20 carbon atoms.
Claim 4
Dependent Claim
28 words
A method according to claim 1 wherein the reaction is conducted at a temperature of about 800*-1,250*F., and a pressure of from about 0.1 up to 0.8 atmosphere.
Claim 5
Dependent Claim
21 words
A method according to claim 1 wherein contact time of the hydrocarbons with the catalyst is about 0.1 to 10 seconds.
Claim 6
Dependent Claim
34 words
A method according to claim 1 wherein the dehydrogenation catalyst is alumina or magnesia promoted with up to 40% by weight of an oxide of Group IV-B, V-B or VI-B of the Periodic Table.
Claim 7
Dependent Claim
15 words
A method according to claim 1 wherein the adsorbent is alumina, magnesia or silica gel.
Claim 8
Dependent Claim
39 words
A method according to claim 1 wherein the reducible oxidation catalyst is a vanadate, molybdate, phosphomolybdate, tungstate or phosphotungstate of Group IV-A or V-A metal promoted by a compound of Group V-B, VI-B or VIII of the Periodic Table.
Claim 9
Dependent Claim
43 words
A method according to claim 7 wherein the oxidation catalayst is a vanadate or molybdate of germanium, tin, lead, antimony or bismuth promoted by a compound of vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium or platinum.
Claim 10
Dependent Claim
22 words
A method according to claim 8 wherein the oxidation catalyst is bismuth vanadate promoted by a compound of palladium, chromium or platinum.
Claim 11
Dependent Claim
15 words
A method according to claim 9 wherein the feedstock comprises paraffins, olefins oR alkylated aromatics.
Claim 12
Dependent Claim
20 words
A method according to claim 10 wherein the feedstock is ethane, propane, butane, isobutane, pentane, isopentane, hexane or mixture thereof.
Claim 13
Dependent Claim
17 words
A method according to claim 10 wherein the feedstock comprises butylenes, pentenes, isopentenes, hexenes or mixture thereof.
Claim 14
Dependent Claim
11 words
A method according to claim 10 wherein the feedstock is ethylbenzene.
References Cited (Backward Citations)
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US3375291A
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US3686346A
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US3737473A
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US3725493A
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |