US2673189A
Expired / Lapsed
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Preparation of copper-nickel-aluminum catalysts
Assignee: Imperial Chemical Industries Ltd
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Filing: 1950-02-08
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Granted: 1954-03-23
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Expires: 1970-02-08
Abstract
No abstract record available.
Inventors
- 👤 Reynolds Peter William
- 👤 Dowden Dennis Albert
- 👤 Mackenzie James Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:35
CPC Classifications
B; B01; B01J; B01J25/00; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE PREPARATION OF COPPERNICKEL-ALUMINUM FORAMINATE CATALYSTS WHICH COMPRISES TREATING GRANULES OF A COPPER-NICKELALUMINUM ALLOY CONTAINING INITIALLY FROM 40 TO 60% BY WEIGHT OF ALUMINUM AND HAVING AN ATOMIC PERCENTAGE OF COPPER GREATER THAN 5 AND SUBSTANTIALLY LESS THAN 40 BY PASSING AN AQUEOUS SOLUTION OF CAUSTIC ALKALI OVER THE GRANULES OF ALLOY AT A SPACE VELOCITY GREATER THAN 10 AND NOT MORE THAN ABOUT 30 AT A TEMPERATURE SUFFICIENT TO REMOVE A SUBSTANTIAL PORTION OF THE ALUMINUM FROM THE SURFACE LAYER OF THE GRANULES, THE TOTAL AMOUNT OF ALUMINUM REMOVED BEING FROM ABOUT 5% TO NOT MORE THAN 70% BY WEIGHT OF THE INITIAL ALUMINUM CONTENT.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE PREPARATION OF COPPERNICKEL-ALUMINUM FORAMINATE CATALYSTS WHICH COMPRISES TREATING GRANULES OF A COPPER-NICKELALUMINUM ALLOY CONTAINING INITIALLY FROM 40 TO 60% BY WEIGHT OF ALUMINUM AND HAVING AN ATOMIC PERCENTAGE OF COPPER GREATER THAN 5 AND SUBSTANTIALLY LESS THAN 40 BY PASSING AN AQUEOUS SOLUTION OF CAUSTIC ALKALI OVER THE GRANULES OF ALLOY AT A SPACE VELOCITY GREATER THAN 10 AND NOT MORE THAN ABOUT 30 AT A TEMPERATURE SUFFICIENT TO REMOVE A SUBSTANTIAL PORTION OF THE ALUMINUM FROM THE SURFACE LAYER OF THE GRANULES, THE TOTAL AMOUNT OF ALUMINUM REMOVED BEING FROM ABOUT 5% TO NOT MORE THAN 70% BY WEIGHT OF THE INITIAL ALUMINUM CONTENT.
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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |