Patent US3931045A successfully refreshed from Google Patents.
US3931045A
Expired / Lapsed
US
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Catalyst activation
Assignee: Phillips Petroleum Co
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Filing: 1973-05-07
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Granted: 1976-01-06
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Expires: 1993-05-07
Abstract
Abstract Solid comminuted catalytic materials are activated by passing an activating stream through a shallow deposit of such materials on a porous substrate, characterized in that the catalyst particles are in a quiescent state during contact with the activating stream.
Inventors
- 👤 Elton E. Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:24
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/12; B01J37/14; Y; Y10; Y10S; Y10S502/00; Y10S502/523
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
In a process for activating a solid, particulate metal oxide catalytic material which comprises contacting said material with a heated free oxygen-containing gas, the improvement which comprises emplacing a deposit having a thickness in the range of about 0.05 inch to about 1 inch of said particulate catalytic material on a porous substrate comprising a sintered metal; passing a stream of a free oxygen-containing gas through said deposit and said porous substrate at a temperature in the approximate range of 400° to 2,000°F for a period of time sufficient to activate said catalytic material, said deposit being maintained in a quiescent state during said time period, dislodging the thus activated catalytic material from said porous substrate; and separately recovering said activated catalytic material.
Claim 2
Dependent Claim
123 words
In a process for activating a solid, particulate metal oxide catalytic material which comprises contacting said material with a heated free oxygen-containing gas, the improvement which comprises emplacing a deposit having a thickness in the range of about 0.05 inch to about 1 inch of said particulate catalytic material on a porous substrate comprising a sintered metal; passing a stream of a free oxygen-containing gas through said deposit and said porous substrate at a temperature in the approximate range of 400° to 2,000°F for a period of time sufficient to activate said catalytic material, said deposit being maintained in a quiescent state during said time period, dislodging the thus activated catalytic material from said porous substrate; and separately recovering said activated catalytic material.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said deposit thickness is in the approximate range of 0.1 inch to 0.4 inch.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said oxygen-containing gas is molecular oxygen.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein said oxygen-containing gas is air.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein said oxygen-containing gas has a superficial velocity in the approximate range of 0.01 to 10 feet per second.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein said oxygen-containing gas has a superficial velocity in the approximate range of 0.05 to 2 feet per second.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein said temperature is in the approximate range of 800° to 1,800°F.
Claim 9
Dependent Claim
21 words
The process of claim 1 wherein said time period of activation is in the approximate range of 1 to 20 hours.
Claim 10
Dependent Claim
35 words
The process of claim 1 wherein said catalytic material is a chromium oxide-based catalyst, said deposit thickness is 0.2 inch, said temperature is 1,650°F, said time is 12 hours and said oxygen-containing gas is air.
Claim 11
Dependent Claim
12 words
The process of claim 1 wherein said porous substrate is a cylinder.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the pressure drop across said deposit and said substrate is not more than 280 inches of water.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |