US2941961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica-alumina compositions and method for the preparation thereof
Assignee: ChampionX LLC
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Filing: 1955-10-13
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Granted: 1960-06-21
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Expires: 1975-10-13
Abstract
No abstract record available.
Inventors
- 👤 David G Braithwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:48
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/512
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
A PROCESS FOR PREPARING SILICA-ALUMINA COMPOSITIONS WHICH COMPRISES PRECIPITATING SILICA IN HYDROUS FORM BY ADDING TO AN AQUEOUS ALKALINE SILICATE SOLUTION A QUANTITY OF AN ACID FROM THE GROUP CONSISTING OF SULFURIC ACID AND HYDROCHLORIC ACID, ADDING TO THE RESULTANT SLURRY AND AQUEOUS SOLUTION OF A SOLUBLE INORGANIC ALUMINUM SALT CONTAINING THE ALUMINUM IN THE ANION PORTION, SAID SALT BEING FROM THE GROUP CONSISTING OF SODIUM ALUMINATE AND CALCIUM ALUMINATE, ADDING TO THE RESULTANT SLURRY AN AQUEOUS SOLUTION OF A SOLUBLE INORGANIC ALUMINUM SALT CONTAINING ALUMINUM IN THE CATION PORTION, SAID LASTNAMED ALUMINUM SALT BEING FROM THE GROUP CONSISTING OF ALUMINUM SULFATE AND ALUMINUM CHLORIDE, AND RECOVERING THE RESULTANT SOLID PRODUCT CONTAINING SILICA IN HYDROUS FROM IMPREGNATED WITH ALUMINA PRECIPITATED FROM AN ALUMINUM SALT IN WHICH THE ALUMINUM EXISTS IN THE ANION PORTION OF THE SALT AND FROM AN ALUMINUM SALT IN WHICH THE ALUMINUM EXISTS IN THE CATION PORTION OF THE SALT, AT LEAST ONE OF THE AFOREMENTIONED REACTIONS TAKING PLACE IN THE PRESENCE OF A COMPOUND FROM THE GROUP CONSISTING OF ALDONIC ACIDS AND ALDONATES, THE QUANTITY OF SAID LAST NAMES COMPOUND, CALCULATED AS GLUCONIC ACID, BEING AT LEAST 1% BY WEIGHT OF THE ALUMINUM, CALCULATED AS AL2O3, IN THE RESULTANT PRODUCT, AND THE SILICA PREDOMINATING OVER THE ALUMINA IN SAID PRODUCT.
Claim 2
Dependent Claim
214 words
A PROCESS FOR PREPARING SILICA-ALUMINA COMPOSITIONS WHICH COMPRISES PRECIPITATING SILICA IN HYDROUS FORM BY ADDING TO AN AQUEOUS ALKALINE SILICATE SOLUTION A QUANTITY OF AN ACID FROM THE GROUP CONSISTING OF SULFURIC ACID AND HYDROCHLORIC ACID, ADDING TO THE RESULTANT SLURRY AND AQUEOUS SOLUTION OF A SOLUBLE INORGANIC ALUMINUM SALT CONTAINING THE ALUMINUM IN THE ANION PORTION, SAID SALT BEING FROM THE GROUP CONSISTING OF SODIUM ALUMINATE AND CALCIUM ALUMINATE, ADDING TO THE RESULTANT SLURRY AN AQUEOUS SOLUTION OF A SOLUBLE INORGANIC ALUMINUM SALT CONTAINING ALUMINUM IN THE CATION PORTION, SAID LASTNAMED ALUMINUM SALT BEING FROM THE GROUP CONSISTING OF ALUMINUM SULFATE AND ALUMINUM CHLORIDE, AND RECOVERING THE RESULTANT SOLID PRODUCT CONTAINING SILICA IN HYDROUS FROM IMPREGNATED WITH ALUMINA PRECIPITATED FROM AN ALUMINUM SALT IN WHICH THE ALUMINUM EXISTS IN THE ANION PORTION OF THE SALT AND FROM AN ALUMINUM SALT IN WHICH THE ALUMINUM EXISTS IN THE CATION PORTION OF THE SALT, AT LEAST ONE OF THE AFOREMENTIONED REACTIONS TAKING PLACE IN THE PRESENCE OF A COMPOUND FROM THE GROUP CONSISTING OF ALDONIC ACIDS AND ALDONATES, THE QUANTITY OF SAID LAST NAMES COMPOUND, CALCULATED AS GLUCONIC ACID, BEING AT LEAST 1% BY WEIGHT OF THE ALUMINUM, CALCULATED AS AL2O3, IN THE RESULTANT PRODUCT, AND THE SILICA PREDOMINATING OVER THE ALUMINA IN SAID PRODUCT.
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |