US3960775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the production of ethylene oxide
Assignee: SnamProgetti SpA
•
Filing: 1973-08-01
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Granted: 1976-06-01
•
Expires: 1993-08-01
Abstract
Abstract The present invention provides a novel catalyst for use in the manufacture of ethylene oxide from ethylene. The catalyst comprises silver, calcium and barium in gram atomic ratio of 15/2.5/1.
Inventors
- 👤 Carlo Piccinini
- 👤 Morello Morelli
- 👤 Pierluigi Rebora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:59
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
A catalyst for the oxidation of ethylene to ethylene oxide, said catalyst comprising silver, calcium and barium in a gram atomic ratio of 15/2.5/1.
Claim 2
Dependent Claim
24 words
A catalyst for the oxidation of ethylene to ethylene oxide, said catalyst comprising silver, calcium and barium in a gram atomic ratio of 15/2.5/1.
Claim 3
Dependent Claim
12 words
The catalyst of claim 1 wherein said catalyst includes a ceramic carrier.
Claim 4
Dependent Claim
11 words
The catalyst of claim 2 wherein said ceramic carrier is alumina.
Claim 5
Dependent Claim
15 words
The catalyst of claim 3 wherein the alumina has a volume porosity of about 50%.
Claim 6
Dependent Claim
16 words
The catalyst of claim 4 wherein the pores have radii ranging between 100 and 700 microns.
Claim 7
Dependent Claim
15 words
The catalyst of claim 1 wherein the carbonates of silver, calcium and barium are employed.
References Cited (Backward Citations)
US3332887A
Cited
US3725307A
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US3773693A
Cited
US3775346A
Cited
US3664970A
Cited
US3793231A
Cited
US3781224A
Cited
US3794588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |