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US3144416A
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Method of manfacturing silver catalysts to be used for vapor phase direct oxidation of olefins
Assignee: Furukawa Electric Co Ltd
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Filing: 1960-02-04
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Granted: 1964-08-11
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Expires: 1980-02-04
Abstract
No abstract record available.
Inventors
- 👤 Hosoda Kirokuro
- 👤 Kinoshita Hideo
- 👤 Hirasa Katsuyoshi
- 👤 Namiki Isamu
- 👤 Noguchi Isamu
- 👤 Hirayama Toshiharu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:41
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/54; B01J23/66; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A METHOD OF MANUFACTURING A SILVER CATALYST FOR USE IN THE VAPOUR PHASE CATALYTIC OXIDATION OF OLEFIN, WHICH COMPRISES FORMING A SLURRY WITH A VOLATILE LIQUID INERT TO SILVER AND A POWDER OF ACTIVE CATALYTIC SILVER AND A POWDER OF ELECTROYLIC SILVER HAVING A DENDRITIC STRUCTURE WHICH HAS BEEN DEPOSITED ON A CATHODE IN THE ELECTROLYSIS OF SILVER NITRATE SOLUTION, IN A PROPORTION OF ACTIVE CATALYTIC SILVER POWDER TO ELECTROLYTIC SILVER WITHIN A RANGE OF FROM 10 TO 50% BY WEIGHT TO DILUTE AND DISSPERSE THE POWDER OF ACTIVE SILVER INTO THE POWDER OF ELECTROLYTIC SILVER, THE SIZE OF POWDER OF INACTIVE ELECTROLYTIC SILVER BEING WITHIN THE RANGE OF -50+200 MESH, DRYING THE SLURRY AND PRESSMOLDING THE PRODUCT THUS OBTAINED INTO GRANULES; SAID CATALYTIC SILVER POWDER BEING PRODUCED BY REDUCING SILVER OXIDE OBTAINED BY REACTING CAUSTIC ALKALI WITH SILVER SALTS.
Claim 2
Independent Claim
140 words
A METHOD OF MANUFACTURING A SILVER CATALYST FOR USE IN THE VAPOUR PHASE CATALYTIC OXIDATION OF OLEFIN, WHICH COMPRISES FORMING A SLURRY WITH A VOLATILE LIQUID INERT TO SILVER AND A POWDER OF ACTIVE CATALYTIC SILVER AND A POWDER OF ELECTROYLIC SILVER HAVING A DENDRITIC STRUCTURE WHICH HAS BEEN DEPOSITED ON A CATHODE IN THE ELECTROLYSIS OF SILVER NITRATE SOLUTION, IN A PROPORTION OF ACTIVE CATALYTIC SILVER POWDER TO ELECTROLYTIC SILVER WITHIN A RANGE OF FROM 10 TO 50% BY WEIGHT TO DILUTE AND DISSPERSE THE POWDER OF ACTIVE SILVER INTO THE POWDER OF ELECTROLYTIC SILVER, THE SIZE OF POWDER OF INACTIVE ELECTROLYTIC SILVER BEING WITHIN THE RANGE OF -50+200 MESH, DRYING THE SLURRY AND PRESSMOLDING THE PRODUCT THUS OBTAINED INTO GRANULES; SAID CATALYTIC SILVER POWDER BEING PRODUCED BY REDUCING SILVER OXIDE OBTAINED BY REACTING CAUSTIC ALKALI WITH SILVER SALTS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |