Patent US3882048A successfully refreshed from Google Patents.
US3882048A
Expired / Lapsed
US
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Supported vanadium-palladium-containing catalyst
Assignee: Bayer AG
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Filing: 1973-01-04
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Granted: 1975-05-06
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Expires: 1993-01-04
Abstract
Abstract Nitrobenzene is reduced to aniline with hydrogen under elevated temperatures and pressure in the presence of a catalyst containing 0.1 to 10 percent by weight palladium and 0.1 to 5 percent by weight vanadium or a compound of vanadium on an aluminum oxide support wherein at least 20 percent thereof has been converted into lithium-aluminum spinel.
Inventors
- 👤 Hermann Thelen
- 👤 Kurt Halcour
- 👤 Wulf Schwerdtel
- 👤 Wolfgang Swodenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:24
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/648; B01J23/6482; C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36; Y; Y10; Y10S; Y10S502/00; Y10S502/524
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
SUPPORTED CATALYST COMPRISING FROM ABOUT 0.1 TO ABOUT 10 PERCENT BY WEIGHT OF PALLADIUM AND FROM ABOUT 0.1 TO ABOUT 5 PERCENT BY WEIGHT OF VANADIUM OR A VANADIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF INORGANIC VANADIUM SALT AND VANADIUM OXIDE SUPPORTED ON AN ALUMINA AT LEAST 20 PERCENT OF WHICH HAS BEEN CONVERTED INTO LITHIUMALUMINUM SPINEL.
Claim 2
Dependent Claim
58 words
SUPPORTED CATALYST COMPRISING FROM ABOUT 0.1 TO ABOUT 10 PERCENT BY WEIGHT OF PALLADIUM AND FROM ABOUT 0.1 TO ABOUT 5 PERCENT BY WEIGHT OF VANADIUM OR A VANADIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF INORGANIC VANADIUM SALT AND VANADIUM OXIDE SUPPORTED ON AN ALUMINA AT LEAST 20 PERCENT OF WHICH HAS BEEN CONVERTED INTO LITHIUMALUMINUM SPINEL.
Claim 3
Dependent Claim
29 words
Catalyst of claim 1 wherein the lithium-aluminum spinel has a specific surface of from 20 to 120 m2/g and an average pore diameter of from 200 to 800 A.
Claim 4
Dependent Claim
30 words
Catalyst of claim 1 containing from about 0.1 to about 5 percent by weight of palladium and from about 0.3 to about 1 percent by weight of said vanadium compound.
Claim 5
Dependent Claim
43 words
Catalyst of claim 1 containing about 1.5 percent by weight of palladium and about 0.6 percent by weight of vanadium or said vanadium compound supported on lithium-aluminum spinel with a specific surface of 25 m2/g and an average pore diameter of 700 A.
References Cited (Backward Citations)
US3240805A
Cited
US3207703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |