US2777823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron catalyst for catalytic carbon monoxide hydrogenation
Assignee: Lurgi Gesellschaft fuer Waermetechnik mbH
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Filing: 1952-03-26
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Granted: 1957-01-15
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Expires: 1972-03-26
Abstract
No abstract record available.
Inventors
- 👤 Rottig Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:19
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A METHOD FOR THE PRODUCTION OF PRECIPITATED IRON CATALYST FOR THE CATALYTIC HYDROGENATION OF CARBON MONOXIDE HAVING A RATAIO OF ALKALI OXIDE TO SIO2, CALCULATED AS K2O:SIO2 OF 1:4 TO 1:5, THE IMPROVEMENTS WHICH COMPRISES ADDING TO AN IRON HYDROXIDE SUSPENSION OF SILICEOUS MATERIAL OTHER THAN POTASSIUM WATER GLASS CONSISTING PREDOMINANTLY OF SIO2 AND ADDITIONALLY SIO2 IN THE FORM OF POTASSIUM WATER GLASS, SAID SILICEOUS MATERIAL AND SAID POTASSIUM WATER GLASS BEING ADDED IN PROPORTIONAL AMOUNTS SUFFICIENT TO PRODUCE A RTIO OF 20-25 PARTS BY WEIGHT OF SIO2 FOR EACH 100 PARTS BY WEIGHT OF IRON, AND RECOVERING A CATALYST HAVING A RATIO OF ALKALI OXIDE TO SIO2 CALCULATED AS K2O:SIO2 OF 1:4 TO 1:5.
Claim 2
Dependent Claim
116 words
IN A METHOD FOR THE PRODUCTION OF PRECIPITATED IRON CATALYST FOR THE CATALYTIC HYDROGENATION OF CARBON MONOXIDE HAVING A RATAIO OF ALKALI OXIDE TO SIO2, CALCULATED AS K2O:SIO2 OF 1:4 TO 1:5, THE IMPROVEMENTS WHICH COMPRISES ADDING TO AN IRON HYDROXIDE SUSPENSION OF SILICEOUS MATERIAL OTHER THAN POTASSIUM WATER GLASS CONSISTING PREDOMINANTLY OF SIO2 AND ADDITIONALLY SIO2 IN THE FORM OF POTASSIUM WATER GLASS, SAID SILICEOUS MATERIAL AND SAID POTASSIUM WATER GLASS BEING ADDED IN PROPORTIONAL AMOUNTS SUFFICIENT TO PRODUCE A RTIO OF 20-25 PARTS BY WEIGHT OF SIO2 FOR EACH 100 PARTS BY WEIGHT OF IRON, AND RECOVERING A CATALYST HAVING A RATIO OF ALKALI OXIDE TO SIO2 CALCULATED AS K2O:SIO2 OF 1:4 TO 1:5.
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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |