Patent US3471005A successfully refreshed from Google Patents.
Patent US3264227A successfully refreshed from Google Patents.
US3264227A
Expired / Lapsed
US
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Manufacture of a silica-zirconiaalumina catalyst
Assignee: ExxonMobil Oil Corp
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Filing: 1961-03-13
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Granted: 1966-08-02
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Expires: 1981-03-13
Abstract
No abstract record available.
Inventors
- 👤 Robert H Cramer
- 👤 Abbott F Houser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:49
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A METHOD OF PREPARNG A SOLID POROUS CATALYST OF SILICA-ZIRCONIA-ALUMINA WHICH COMPRISES INTIMATELY CONTACTING AN AQUEOUS ACIDIC SOLUTION OF A ZIRCONIUM SALT WITH AN AQUEOUS ALKALI METAL SILICATE SOLUTION TO FORM A HYDROSOL HAVING A PH OF FROM ABOUT 7 TO 10 WHICH SUBSEQUENTLY SETS TO A HYDROGEL CONTAINING FROM 0.5 TO 25 PERCENT ZIRCONIA AND FROM 75 TO 99.5 PERCENT SILICA BASED ON COGELLED OXIDES ONLY, PERMITTING SAID HYDROSOL TO SET TO SAID HYDROGEL, TREATING SAID HYDROGEL FOR FROM ABOUT 1 TO 24 HOURS WITH A HOT AQUEOUS SOLUTION OF AN ALUMINUM SALT AT A TEMPERA!URE OF FROM ABOUT 125 TO 200*F. TO INDUCE BASE EXCHANGE BETWEEN SAID ALUMINUM SALT ND HYDROGEL AND FORM A SILICA-ZIRCONIA-ALUMINA HYDROGEL CONTANING, ON A DRY BASIS, FROM ABOUT 0.5 TO 5 PERCENT ALUMINA, WASHING SAID HYDROGEL FREE OF WATER-SOLUBLE MATERIAL, DRYING AND CALCINING.
Claim 2
Independent Claim
140 words
A METHOD OF PREPARNG A SOLID POROUS CATALYST OF SILICA-ZIRCONIA-ALUMINA WHICH COMPRISES INTIMATELY CONTACTING AN AQUEOUS ACIDIC SOLUTION OF A ZIRCONIUM SALT WITH AN AQUEOUS ALKALI METAL SILICATE SOLUTION TO FORM A HYDROSOL HAVING A PH OF FROM ABOUT 7 TO 10 WHICH SUBSEQUENTLY SETS TO A HYDROGEL CONTAINING FROM 0.5 TO 25 PERCENT ZIRCONIA AND FROM 75 TO 99.5 PERCENT SILICA BASED ON COGELLED OXIDES ONLY, PERMITTING SAID HYDROSOL TO SET TO SAID HYDROGEL, TREATING SAID HYDROGEL FOR FROM ABOUT 1 TO 24 HOURS WITH A HOT AQUEOUS SOLUTION OF AN ALUMINUM SALT AT A TEMPERA!URE OF FROM ABOUT 125 TO 200*F. TO INDUCE BASE EXCHANGE BETWEEN SAID ALUMINUM SALT ND HYDROGEL AND FORM A SILICA-ZIRCONIA-ALUMINA HYDROGEL CONTANING, ON A DRY BASIS, FROM ABOUT 0.5 TO 5 PERCENT ALUMINA, WASHING SAID HYDROGEL FREE OF WATER-SOLUBLE MATERIAL, DRYING AND CALCINING.
References Cited (Backward Citations)
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Cited
US2453585A
Cited
US2472830A
Cited
US2634241A
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US3015620A
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US3003951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |