US2802889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation of acetylene in ethylene and catalyst therefor
Assignee: Dow Chemical Co
•
Filing: 1954-06-01
•
Granted: 1957-08-13
•
Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Ludo K Frevel
- 👤 Leonard J Kressley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/70; B01J23/89; B01J23/8926; C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; B01J23/40; B01J23/44; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/48; C07C2523/50; C07C2523/52; C07C2523/70; C07C2523/72
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A METHOD FOR TREATMENT OF A GASEOUS MIXTURE COMPRISING ETHYLENE AND ACETYLENE, WHICH METHOD COMPRISES SELECTIVELY HYDROGENATING THE ACETYLENE THEREIN BY CONTACTING THAT MIXTURE, TOGETHER WITH HYDROGEN IN PROPORTION GREATER THAN ONE MOLE BY HYDROGEN PER MOLE OF ACETYLENE WITH A CATALYTIC BODY CONTAINING AN EFFECTIVE PROPORTION OF A COMPOSITE METAL MATERIAL WHEREIN ARE FROM 60 TO 99 PARTS BY WEIGHT OF PALLADIUM AND FROM 40 TO 1 PART OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF COPPER, SILVER AND GOLD.
Claim 2
Independent Claim
82 words
A METHOD FOR TREATMENT OF A GASEOUS MIXTURE COMPRISING ETHYLENE AND ACETYLENE, WHICH METHOD COMPRISES SELECTIVELY HYDROGENATING THE ACETYLENE THEREIN BY CONTACTING THAT MIXTURE, TOGETHER WITH HYDROGEN IN PROPORTION GREATER THAN ONE MOLE BY HYDROGEN PER MOLE OF ACETYLENE WITH A CATALYTIC BODY CONTAINING AN EFFECTIVE PROPORTION OF A COMPOSITE METAL MATERIAL WHEREIN ARE FROM 60 TO 99 PARTS BY WEIGHT OF PALLADIUM AND FROM 40 TO 1 PART OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF COPPER, SILVER AND GOLD.
Claim 3
Dependent Claim
79 words
A CATALYST, EFFECTIVE IN PROMOTING THE SELECTIVE HYDROGENATION OF ACETYLENE IN CONTACT WITH A GAS MIXTURE OF ACETYLENE, ETHYLENE AND HYDROGEN, WHICH CATALYST COMPRISES A CATALYTICALY INACTIVE CARRIER AND AN EFFECTIVE PROPORTION NOT GREATER THAN 5 PERCENT BY WEIGHT OF THE CATALYST OF A CATALYTICALLY ACTIVE METAL COMPOSITION CONSISTING OF FROM 60 TO 99 PARTS BY WEIGHT OF PALLADIUM AND FROM 40 TO 1 PART OF A MODIFYING ELEMENT SELECTED FROM THE GROUP CONSISTING OF COPPER, SILVER AND GOLD.
Claim 4
Dependent Claim
79 words
A CATALYST, EFFECTIVE IN PROMOTING THE SELECTIVE HYDROGENATION OF ACETYLENE IN CONTACT WITH A GAS MIXTURE OF ACETYLENE, ETHYLENE AND HYDROGEN, WHICH CATALYST COMPRISES A CATALYTICALY INACTIVE CARRIER AND AN EFFECTIVE PROPORTION NOT GREATER THAN 5 PERCENT BY WEIGHT OF THE CATALYST OF A CATALYTICALLY ACTIVE METAL COMPOSITION CONSISTING OF FROM 60 TO 99 PARTS BY WEIGHT OF PALLADIUM AND FROM 40 TO 1 PART OF A MODIFYING ELEMENT SELECTED FROM THE GROUP CONSISTING OF COPPER, SILVER AND GOLD.
References Cited (Backward Citations)
US2178454A
Cited
US1739306A
Cited
US1935188A
Cited
US1836927A
Cited
US2167708A
Cited
US2359759A
Cited
US2423686A
Cited
US2437706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |