US3147227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of aluminum hydroxy-phosphate xerogels
Assignee: Union Oil Company of California
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Filing: 1961-01-09
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Granted: 1964-09-01
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Expires: 1981-01-09
Abstract
No abstract record available.
Inventors
- 👤 Rowland C Hansford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:50
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR THE MANUFACTURE OF ALUMINUM HYDROXY-PHOSPHATE XEROGELS OF HIGH SURFACE AREA AND HIGH ACIDITY, WHICH COMPRISES FORMING AN ACIDIC WATER SOLUTION OF (1) AN ALUMINUM SALT SELECTED FROM THE CALSS CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM NITRATE, (2) PHOSPHORIC ACID IN PROPORTIONS SUFFICIENT TO PROVIDE BETWEEN ABOUT 0.02 AND 0.9 MOLE OF PHOSPHATE ION PER MOLE OF ALUMINUM SALT, AND (3) UREA; HEATING THE RESULTING SOLUTION AT A TEMPERATURE SUFFICIENTLY HIGH TO EFFECT DECOMPOSITION OF SAID UREA WITH RESULTANT LIBERATION OF AMMONIA IN AMOUNTS SUFFICIENT TO RAISE THE PH OF SAID SOLUTION TO ABOVE THE GELATION POINT, THEREBY PRECIPITATING AN ALUMMINUM HYDROXYPHOSPHATE HYDROGEL, TREATING SAID HYDROGEL TO REMOVE CONTAIMINATING SALT AND DRYING THE SAME TO FORM A XEROGEL.
Claim 2
Dependent Claim
120 words
A PROCESS FOR THE MANUFACTURE OF ALUMINUM HYDROXY-PHOSPHATE XEROGELS OF HIGH SURFACE AREA AND HIGH ACIDITY, WHICH COMPRISES FORMING AN ACIDIC WATER SOLUTION OF (1) AN ALUMINUM SALT SELECTED FROM THE CALSS CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM NITRATE, (2) PHOSPHORIC ACID IN PROPORTIONS SUFFICIENT TO PROVIDE BETWEEN ABOUT 0.02 AND 0.9 MOLE OF PHOSPHATE ION PER MOLE OF ALUMINUM SALT, AND (3) UREA; HEATING THE RESULTING SOLUTION AT A TEMPERATURE SUFFICIENTLY HIGH TO EFFECT DECOMPOSITION OF SAID UREA WITH RESULTANT LIBERATION OF AMMONIA IN AMOUNTS SUFFICIENT TO RAISE THE PH OF SAID SOLUTION TO ABOVE THE GELATION POINT, THEREBY PRECIPITATING AN ALUMMINUM HYDROXYPHOSPHATE HYDROGEL, TREATING SAID HYDROGEL TO REMOVE CONTAIMINATING SALT AND DRYING THE SAME TO FORM A XEROGEL.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |