US3899342A
Expired / Lapsed
US
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Complex phosphates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-10-12
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Granted: 1975-08-12
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Expires: 1992-10-12
Abstract
Abstract Solid water-soluble aluminum phosphate complexes and binder composition which dissolve in water to give solutions containing aluminum ions and orthophosphate ions in such proportions as to provide an Al:P ratio of substantially 1:1 together with the anions of a carboxylic acid or a mineral oxyacid.
Inventors
- 👤 James Derek Birchall
- 👤 John Edward Cassidy
- 👤 Nicholas Rolfe
- 👤 Clifford Granville Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:45
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
A METHOD OF BINDING REFACTORY SOLIDS WHICH COMPRISES FORMING A SLURRY OR PASTE CONTAINING THE SOLIDS TO BE BOUND AND AN AQUEOUS SOLUTION CONTAINING ALUMINUM IONS AND ORTHOPHOSPHATE IONS IN AN AL:P RATIO OF SUBSTANTIALLY 1:1 AND ADDITIONALLY THE ANIONS OF A CARBOXYLIC ACID OR A MINERAL OXYACID IN A RATIO OF ADDITIONAL ANION: ALUMINIUM IONS IN THE RANGE OF 0.5 TO 4.1, THE AQUEOUS SOLUTION CONTAINING FROM 1 TO 25% OF SOLIDS BY WEGHT OF THE REFRACTORY SOLIDS TO BE BOUND, AND CURING THE POSPHATE BINDER.
Claim 2
Independent Claim
87 words
A METHOD OF BINDING REFACTORY SOLIDS WHICH COMPRISES FORMING A SLURRY OR PASTE CONTAINING THE SOLIDS TO BE BOUND AND AN AQUEOUS SOLUTION CONTAINING ALUMINUM IONS AND ORTHOPHOSPHATE IONS IN AN AL:P RATIO OF SUBSTANTIALLY 1:1 AND ADDITIONALLY THE ANIONS OF A CARBOXYLIC ACID OR A MINERAL OXYACID IN A RATIO OF ADDITIONAL ANION: ALUMINIUM IONS IN THE RANGE OF 0.5 TO 4.1, THE AQUEOUS SOLUTION CONTAINING FROM 1 TO 25% OF SOLIDS BY WEGHT OF THE REFRACTORY SOLIDS TO BE BOUND, AND CURING THE POSPHATE BINDER.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1 wherein the solution contains aluminium and phosphorus in a ratio of 1:0.95 to 1:1.05.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 1 wherein the additional anions in the solution are nitrate anions.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 1 wherein the ratio of additional anions to aluminium ions in the solution is in the range 0.7:1 to 1.2:1.
Claim 6
Dependent Claim
23 words
A method as claimed in claim 1 wherein a cold-setting agent for the phosphate binder is included in the slurry or paste formed.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 1 wherein the binder is cured by heating to a temperature of at least 80*C.
Claim 8
Dependent Claim
86 words
A solid mix comprising a refractory material and from 1 to 25%, based on the weight of the refractory material, of a solid water-soluble aluminium phosphate binder which is capable of dissolving in water to form a solution containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or a mineral oxyacid, said ions being present in the solution in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion:aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 9
Dependent Claim
86 words
A solid mix comprising a refractory material and from 1 to 25%, based on the weight of the refractory material, of a solid water-soluble aluminium phosphate binder which is capable of dissolving in water to form a solution containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or a mineral oxyacid, said ions being present in the solution in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion:aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 10
Dependent Claim
76 words
A solid mix comprising a solid water-soluble aluminium phosphate binder and a cold-setting agent therefor, the binder being capable of dissolving in water to form a solution containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or a mineral oxyacid said ions being present in the solution in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion: aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 11
Dependent Claim
76 words
A solid mix comprising a solid water-soluble aluminium phosphate binder and a cold-setting agent therefor, the binder being capable of dissolving in water to form a solution containing aluminium ions, orthophosphate ions and additionally the anions of a carboxylic acid or a mineral oxyacid said ions being present in the solution in such proportions as to provide an Al:P ratio of substantially 1:1 and an additional anion: aluminium ion ratio in the range 0.5:1 to 4:1.
Claim 12
Dependent Claim
20 words
A method as claimed in claim 1 wherein the additional anion: Al ratio is in the range 0.5:1 to 1.2:1.
Claim 13
Dependent Claim
17 words
A method as claimed in claim 1 wherein the additional anion: Al ratio is at least 0.7.
Claim 14
Dependent Claim
45 words
A method as claimed in claim 1 where the solution is prepared by dissolving in water solid water-soluble complex phosphate of aluminium, containing Al:P in a ratio of substantially 1:1, and containing chemically-bound water and a chemically-bound anion of a carboxylic acid or mineral oxyacid.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |