US3821323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation of minor amounts of acetylene in a gas mixture containing major amounts of ethylene
Assignee: BASF SE
•
Filing: 1972-11-14
•
Granted: 1974-06-28
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Expires: 1992-11-14
Abstract
Abstract Selective gas-phase hydrogenation of minor amounts of acetylene in a gas mixture containing major amounts of ethylene, using a palladium-on-silica gel catalyst which contains zinc.
Inventors
- 👤 G Wittmann
- 👤 G Schulze
- 👤 A Sliwka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:51
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/60; C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; C07C2521/00; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/54; C07C2523/56; C07C2523/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
A process as set forth in claim 1, wherein the supported catalyst has a palladium content of from 0.001 to 1 percent by weight and a zinc content of from 0.0005 to 2.5 percent by weight.
Claim 2
Dependent Claim
36 words
A process as set forth in claim 1, wherein the supported catalyst has a palladium content of from 0.005 to 0.25 percent by weight and a zinc content of from 0.001 to 1 percent by weight.
Claim 3
Dependent Claim
22 words
A process as set forth in claim 3, wherein the ratio of palladium to zinc is from 25:1 to 0.1:1 by weight.
Claim 4
Dependent Claim
30 words
A process as set forth in claim 4 wherein said mixture contains at least 50 percent by volume of ethylene and from 0.2 to 2.0 percent by volume of acetylene.
Claim 5
Dependent Claim
28 words
A process as set forth in claim 5 wherein said gas mixture is passed to a hydrogenation zone at an inlet temperature at from 15* to 70* C.
Claim 6
Dependent Claim
28 words
A process as set forth in claim 5 wherein said gas mixture is passed to a hydrogenation zone at an inlet temperature at from 25* to 45* C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |