US4070413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation of saturated hydrocarbons
Assignee: Honeywell UOP LLC
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Filing: 1976-10-28
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Granted: 1978-01-24
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Expires: 1996-10-28
Abstract
Abstract Paraffinic hydrocarbons are dehydrogenated in contact with a catalytic composite comprising from about 0.01 to about 2.0 wt. % Group VIII metal and from about 0.01 to about 0.1 wt. % lithium impregnated on an alumina support, said alumina having been hydrothermally treated in steam at a temperature of from about 800 DEG to about 1200 DEG C.
Inventors
- 👤 Tamotsu Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:19
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/324; C07C5/325; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01J23/62; B01J23/622; B01J23/626; B01J37/00; B01J37/08; B01J37/10; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
A process for dehydrogenating a paraffinic hydrocarbon which comprises contacting said hydrocarbon at dehydrogenation reaction conditions including a temperature of from about 400° to about 700° C. with a catalytic composite of from about 0.01 to about 2.0 wt. % Group VIII metal component and from about 0.01 to about 0.1 wt. % of an alkali metal or alkaline earth metal component with a precalcined alumina support which has been hydrothermally treated with steam at a temperature of from about 800° to about 1200° C. after its calcination and prior to the compositing of said metal components therewith.
Claim 2
Dependent Claim
98 words
A process for dehydrogenating a paraffinic hydrocarbon which comprises contacting said hydrocarbon at dehydrogenation reaction conditions including a temperature of from about 400° to about 700° C. with a catalytic composite of from about 0.01 to about 2.0 wt. % Group VIII metal component and from about 0.01 to about 0.1 wt. % of an alkali metal or alkaline earth metal component with a precalcined alumina support which has been hydrothermally treated with steam at a temperature of from about 800° to about 1200° C. after its calcination and prior to the compositing of said metal components therewith.
Claim 3
Dependent Claim
34 words
The process of claim 1 further characterized in that said catalytic composite contains a tin component in from about a 0.5:1 to about a 2:1 atom ratio with a Group VIII metal component thereof.
Claim 4
Dependent Claim
41 words
The process of claim 1 further characterized in that said hydrothermal treatment comprises heating said alumina support in an atmosphere comprising from about 5 to about 50 vol. % steam at a temperature of from about 800° to about 1200° C.
Claim 5
Dependent Claim
41 words
The process of claim 1 further characterized in that said hydrothermal treatment comprises heating said alumina support in an atmosphere comprising from about 20 to about 40 vol. % steam at a temperature of from about 900° to about 1100° C.
Claim 6
Dependent Claim
23 words
The process of claim 1 further characterized in that said Group VIII metal is a metal of the platinum group of Group VIII.
Claim 7
Dependent Claim
15 words
The process of claim 1 further characterized in that said Group VIII metal is platinum.
Claim 8
Dependent Claim
22 words
The process of claim 1 further characterized in that said hydrothermally treated alumina support is, prior to said treatment, a gamma-alumina support.
Claim 9
Dependent Claim
37 words
The process of claim 1 further characterized in that said hydrothermally treated alumina support is, prior to said treatment, a gamma-alumina support characterized by an ABD of from about 0.25 to about 0.45 grams per cubic centimeter.
Claim 10
Dependent Claim
21 words
The process of claim 1 further characterized in that said paraffinic hydrocarbon contains from about 3 to about 18 carbon atoms.
Claim 11
Dependent Claim
14 words
The process of claim 1 further characterized in that said paraffinic hydrocarbon is n-heptane.
Claim 12
Dependent Claim
14 words
The process of claim 1 further characterized in that said paraffinic hydrocarbon is n-decane.
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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |