US4005985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic reactor
Assignee: Phillips Petroleum Co
•
Filing: 1972-01-07
•
Granted: 1977-02-01
•
Expires: 1992-01-07
Abstract
Abstract A method and an improved platinum-tin promoted zinc aluminate catalyst reactor for dehydrogenation of a paraffinic hydrocarbon feed stream as first and second layers of silica-free particles, each positioned in contact with and on opposed surfaces of the catalyst across the direction of feed stream flow through the reactor for preventing the poisoning of said catalyst.
Inventors
- 👤 Thomas Hutson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:13
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/324; C07C5/325; B; B01; B01J; B01J8/00; B01J8/02; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00389; B01J2208/00407; B01J2208/00477; B01J2208/00495
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
In a catalytic reactor for the dehydrogenation of a paraffinic hydrocarbon material feed stream flowing through the reactor from an inlet to an outlet end of the reactor and having a platinum-tin promoted zinc aluminate catalyst layer in the reactor traversing the direction of flow of the feed stream therethrough, the improvement comprising: a first layer of silica-free particles positioned in contact with a lower surface of the platinum-tin promoted zinc aluminate catalyst between said catalyst and the outlet of the reactor, said first layer covering substantially the entire lower surface of said catalyst; and a second layer of silica-free particles positioned in contact with an upper surface of said catalyst between said catalyst and the inlet of the reactor, said second layer covering substantially the entire upper surface of said catalyst.
Claim 2
Dependent Claim
132 words
In a catalytic reactor for the dehydrogenation of a paraffinic hydrocarbon material feed stream flowing through the reactor from an inlet to an outlet end of the reactor and having a platinum-tin promoted zinc aluminate catalyst layer in the reactor traversing the direction of flow of the feed stream therethrough, the improvement comprising: a first layer of silica-free particles positioned in contact with a lower surface of the platinum-tin promoted zinc aluminate catalyst between said catalyst and the outlet of the reactor, said first layer covering substantially the entire lower surface of said catalyst; and a second layer of silica-free particles positioned in contact with an upper surface of said catalyst between said catalyst and the inlet of the reactor, said second layer covering substantially the entire upper surface of said catalyst.
Claim 3
Dependent Claim
19 words
A reactor, as set forth in claim 1, wherein the first and second layers are silica-free stainless steel particles.
Claim 4
Dependent Claim
42 words
A reactor, as set forth in claim 1, wherein the first and second layers are silica-free stainless steel particles, each layer having a total void space per unit depth greater than about the total void space per unit depth of the catalyst.
Claim 5
Dependent Claim
36 words
A reactor, as set forth in claim 1, wherein the particles of the first and second layers are silica-free stainless steel tubing having a diameter of about 1/8 inch and a length of about 3/16 inch.
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) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |