US2852473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing alumina and hydroforming catalyst thereon
Assignee: WR Grace and Co
•
Filing: 1955-06-08
•
Granted: 1958-09-16
•
Expires: 1975-06-08
Abstract
No abstract record available.
Inventors
- 👤 Charles E Welling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; B01J21/00; B01J21/02; B01J21/04; Y; Y10; Y10S; Y10S502/00; Y10S502/50; Y10S502/506; Y10S502/513
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A METHOD OF PREPARING A HARD, POROUS ALUMINA WHICH COMPRISES CONTACTING AMALGAMATED ALUMINUM WITH 25-100 TIMES ITS WEIGHT OF AN AQUEOUS HYDROGEN PEROXIDE SOLUTION CONTAINING ABOUT 1-4% BY WEIGHT H2O2, MAINTAINING THE REACTION MIXTURE BETWEEN ABOUT 70* AND 90* C., SEPARATING THE RESULTING ALUMINA FROM THE AQUEOUS REACTION MIXTURE AND DRYING THE SAME.
Claim 2
Independent Claim
53 words
A METHOD OF PREPARING A HARD, POROUS ALUMINA WHICH COMPRISES CONTACTING AMALGAMATED ALUMINUM WITH 25-100 TIMES ITS WEIGHT OF AN AQUEOUS HYDROGEN PEROXIDE SOLUTION CONTAINING ABOUT 1-4% BY WEIGHT H2O2, MAINTAINING THE REACTION MIXTURE BETWEEN ABOUT 70* AND 90* C., SEPARATING THE RESULTING ALUMINA FROM THE AQUEOUS REACTION MIXTURE AND DRYING THE SAME.
Claim 3
Independent Claim
87 words
A METHOD OF PREPARING A SUPPORTED MOLYBDENA HYDROFORMING CATALYST WHICH COMPRISES FORMING AN ALUMINA BASE BY CONTACTING AMALGAMATED ALUMINUM AT 70-100* C. WITH AN AQUEOUS SOLUTION CONTAINING ABOUT 1-4% BY WEIGHT H2O2 IN A WEIGHT RATIO OF ALUMINUM TO HYDROGEN PEROXIDE BETWEEN 1:25 AND 1:100; WHEREBY SAID ALUMINUMBER IS CONVERTED TO ALUMINA, SEPARATING SAID ALUMINA FROM THE REACTION MIXTURE, SLURRYING THE UNDRIED ALUMINA WITH WATER AND A SOLUTION OF A THERMALLY DECOMPOSABLE MOLYBDENUM COMPOUND, SEPARATING THE THUS TREATED ALUMINA, DRYING, AND THERMALLY ACTIVATING TO FORM A CATALYST.
Claim 4
Independent Claim
87 words
A METHOD OF PREPARING A SUPPORTED MOLYBDENA HYDROFORMING CATALYST WHICH COMPRISES FORMING AN ALUMINA BASE BY CONTACTING AMALGAMATED ALUMINUM AT 70-100* C. WITH AN AQUEOUS SOLUTION CONTAINING ABOUT 1-4% BY WEIGHT H2O2 IN A WEIGHT RATIO OF ALUMINUM TO HYDROGEN PEROXIDE BETWEEN 1:25 AND 1:100; WHEREBY SAID ALUMINUMBER IS CONVERTED TO ALUMINA, SEPARATING SAID ALUMINA FROM THE REACTION MIXTURE, SLURRYING THE UNDRIED ALUMINA WITH WATER AND A SOLUTION OF A THERMALLY DECOMPOSABLE MOLYBDENUM COMPOUND, SEPARATING THE THUS TREATED ALUMINA, DRYING, AND THERMALLY ACTIVATING TO FORM A CATALYST.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |