Patent US2825701A successfully refreshed from Google Patents.
US2825701A
Expired / Lapsed
US
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Catalyst for the production of olefinic oxides
Assignee: Montedison SpA
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Filing: 1954-08-03
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Granted: 1958-03-04
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Expires: 1974-08-03
Abstract
No abstract record available.
Inventors
- 👤 Endler Harry Hermann Alfred
- 👤 Bulgarelli Eugenio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:11
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; B01J23/48; B01J23/50; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR PREPARING A CARRIER-BASED SILVER CATALYST SUITABLE FOR THE CATALYST OXIDATION OF OLEFINS, COMPRISING THE STEPS OF PREPARING AN AQUEOUS SOLUTION CONTAINING A SILVER SALT AND AN ALKALI EARTH SALT AT A MOLAR RATIO FROM 1:1 TO 1:4, DROPWISE ADDING, WHILE STIRRING, A SODIUM CARBONATE SOLUTION TO CO-PRECIPITATE SILVER CARBONATE AND ALKALI EARTH CARBONATE, WASHING THE CO-PRECIPITATE UNTIL THE WASH WATER HAS A PH OF 6.5, DRYING THE COPRECIPITATE, FORMING A SUSPENSION OF THE CO-PRECIPITATE IN AND AQUEOUS SOLUTION OF A MEMBER OF THE GROUP CONSISTING OF GLYCEROL AND ETHYLENE GLYCOLS MIXING A GRANULAR, POROUS REFRACTORY MATERIAL INTO THE SUSPENSION, CAUSING THE COPRECIPITATE TO ADHERE TO THE REFRACTORY MATERIAL BY VACUUM FILTERING SAID AQUEOUS SOLUTION, AND HEATING THE COATED REFRACTORY MATERIAL TO BETWEEN 200 AND 500*C. IN AN ATMOSPHERE OF SAID POLYHYDRIC ALCOHOL FOR 1/2 TO 3 HOURS.
Claim 2
Dependent Claim
140 words
A PROCESS FOR PREPARING A CARRIER-BASED SILVER CATALYST SUITABLE FOR THE CATALYST OXIDATION OF OLEFINS, COMPRISING THE STEPS OF PREPARING AN AQUEOUS SOLUTION CONTAINING A SILVER SALT AND AN ALKALI EARTH SALT AT A MOLAR RATIO FROM 1:1 TO 1:4, DROPWISE ADDING, WHILE STIRRING, A SODIUM CARBONATE SOLUTION TO CO-PRECIPITATE SILVER CARBONATE AND ALKALI EARTH CARBONATE, WASHING THE CO-PRECIPITATE UNTIL THE WASH WATER HAS A PH OF 6.5, DRYING THE COPRECIPITATE, FORMING A SUSPENSION OF THE CO-PRECIPITATE IN AND AQUEOUS SOLUTION OF A MEMBER OF THE GROUP CONSISTING OF GLYCEROL AND ETHYLENE GLYCOLS MIXING A GRANULAR, POROUS REFRACTORY MATERIAL INTO THE SUSPENSION, CAUSING THE COPRECIPITATE TO ADHERE TO THE REFRACTORY MATERIAL BY VACUUM FILTERING SAID AQUEOUS SOLUTION, AND HEATING THE COATED REFRACTORY MATERIAL TO BETWEEN 200 AND 500*C. IN AN ATMOSPHERE OF SAID POLYHYDRIC ALCOHOL FOR 1/2 TO 3 HOURS.
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |