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US4238347A
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Amorphous polyaluminum sulfate compositions
Assignee: Hmc Patents Holding Co Inc
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Filing: 1979-08-09
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Granted: 1980-12-09
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Expires: 1999-08-09
Abstract
Abstract A process is disclosed for preparation of an amorphous polyaluminum sulfate composition of the formula Al(OH)x(SO4)y(H2PO4)z(H2O)w wherein x is about 0.75 to 1.5 y is about 0.7 to 1.07 z is about 0 to 0.2 w is about 2.0 to 4.2 with the proviso that the sum x+2y+z is 3. Water is withdrawn from a fairly fresh polyaluminum sulfate solution having the formula Al(OH)x'(SO4)y'(H2PO4)z'(H2O)w' wherein x' is about 0.75 to 1.5 y' is about 0.7 to 1.07 z' is about 0 to 0.
Inventors
- 👤 Alan B. Gancy
- 👤 Christian A. Wamser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:21
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01F; C01F7/00; C01F7/78; C01F7/786; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/5245
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
An amorphous polyaluminum sulfate a composition of the formula Al(OH).sub.x (SO.sub.4).sub.y (H.sub.2 PO.sub.4).sub.z (H.sub.2 O).sub.w wherein x is about 0.75 to 1.5; y is about 0.7 to 1.07; z is about 0 to 0.2; and w is about 2.0 to 4.2 with the proviso that x+2y+z is 3.
Claim 2
Dependent Claim
48 words
An amorphous polyaluminum sulfate a composition of the formula Al(OH).sub.x (SO.sub.4).sub.y (H.sub.2 PO.sub.4).sub.z (H.sub.2 O).sub.w wherein x is about 0.75 to 1.5; y is about 0.7 to 1.07; z is about 0 to 0.2; and w is about 2.0 to 4.2 with the proviso that x+2y+z is 3.
Claim 3
Dependent Claim
16 words
The amorphous composition as set forth in claim 1 wherein w is about 2.5 to 3.5.
Claim 4
Dependent Claim
16 words
The amorphous composition as set forth in claim 1 wherein x is about 1.1 to 1.3.
Claim 5
Dependent Claim
16 words
The amorphous composition as set forth in claim 1 wherein z is about 0.1 to 0.14.
Claim 6
Dependent Claim
101 words
A process for preparing an amorphous polyaluminum sulfate composition of the formula Al(OH).sub.x (SO.sub.4).sub.y (H.sub.2 PO.sub.4).sub.z (H.sub.2 O).sub.w wherein x is about 0.75 to 1.5; y is about 0.7 to 1.07; z is about 0 to 0.2; and w is about 2.0 to 4.2 with the proviso that x+2y+z is 3, comprising volatilizing water from a polyaluminum sulfate solution having the formula Al(OH).sub.x' (SO.sub.4).sub.y' (H.sub.2 PO.sub.4).sub.z' (H.sub.2 O).sub.w' wherein x' is about 0.75 to 1.5; y' is about 0.7 to 1.07; z' is about 0 to 0.2; and w' is about 18 to 65 with the proviso that x'+2y'+z' is 3.
Claim 7
Dependent Claim
101 words
A process for preparing an amorphous polyaluminum sulfate composition of the formula Al(OH).sub.x (SO.sub.4).sub.y (H.sub.2 PO.sub.4).sub.z (H.sub.2 O).sub.w wherein x is about 0.75 to 1.5; y is about 0.7 to 1.07; z is about 0 to 0.2; and w is about 2.0 to 4.2 with the proviso that x+2y+z is 3, comprising volatilizing water from a polyaluminum sulfate solution having the formula Al(OH).sub.x' (SO.sub.4).sub.y' (H.sub.2 PO.sub.4).sub.z' (H.sub.2 O).sub.w' wherein x' is about 0.75 to 1.5; y' is about 0.7 to 1.07; z' is about 0 to 0.2; and w' is about 18 to 65 with the proviso that x'+2y'+z' is 3.
Claim 8
Dependent Claim
33 words
The process as set forth in claim 5 wherein the water is volatilized from the solution by heating the solution to a temperature of between 25° C. and 100° C. under atmospheric pressure.
Claim 9
Dependent Claim
18 words
The process as set forth in claim 6 wherein the temperature is between 80° C. and 100° C.
Claim 10
Dependent Claim
24 words
The process as set forth in claim 5 wherein the water is volatilized from the solution by subjecting the solution to a reduced pressure.
Claim 11
Dependent Claim
19 words
The process as set forth in claim 5 wherein the water is volatilized from the solution by freeze drying.
Claim 12
Dependent Claim
19 words
The process as set forth in claim 5 wherein the water is volatilized from the solution by spray drying.
Claim 13
Dependent Claim
20 words
The process as set forth in claim 5 wherein the water is volatilized from the solution in a fluidized bed.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |