US4069299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy-aluminum chloride and sulfate polymer production
Assignee: Chevron USA Inc
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Filing: 1976-12-06
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Granted: 1978-01-17
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Expires: 1996-12-06
Abstract
Abstract Hydroxy-aluminum chloride or sulfate polymer is produced by reacting urea and aluminum chloride or aluminum sulfate in aqueous solution. The hydroxy-aluminum chloride and sulfate polymers are useful for consolidating soil in secondary oil recovery and for reducing the caking tendency of ammonium salt fertilizer compositions.
Inventors
- 👤 Clive Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:31
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/48; C01F7/56; C01F7/57; C05; C05C; C05C1/00; C05C1/02; C09; C09K; C09K8/00; C09K8/56; C09K8/57; C09K8/572; C09K8/60; C09K8/607
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
73 words
A process of preparing hydroxy-aluminum chloride or sulfate which comprises reacting urea and aluminum chloride or aluminum sulfate, wherein the molar ratio of aluminum chloride to urea varies from about 1:0.1 to 1:1.3 and the molar ratio of aluminum sulfate to urea varies from about 1:0.1 to 1:2.6, at a temperature of about 50° to 150° C, in aqueous solution medium of about 1 mol to 1000 mols water per mol of urea.
Claim 2
Dependent Claim
73 words
A process of preparing hydroxy-aluminum chloride or sulfate which comprises reacting urea and aluminum chloride or aluminum sulfate, wherein the molar ratio of aluminum chloride to urea varies from about 1:0.1 to 1:1.3 and the molar ratio of aluminum sulfate to urea varies from about 1:0.1 to 1:2.6, at a temperature of about 50° to 150° C, in aqueous solution medium of about 1 mol to 1000 mols water per mol of urea.
Claim 3
Dependent Claim
43 words
The process of claim 1 for preparing hydroxy-aluminum chloride polymer wherein the molar ratio of aluminum chloride to urea varies from about 1:0.5 to 1:1.25 and the molar ratio of aluminum to hydroxyl in the hydroxy-aluminum polymer varies from about 1:1 to 1:2.5.
Claim 4
Dependent Claim
43 words
The process of claim 1 for preparing hydroxy-aluminum chloride polymer wherein the molar ratio of aluminum chloride to urea varies from about 1:1 to 1:1.2 and the molar ratio of aluminum to hydroxyl in the hydroxy-aluminum polymer varies from about 1:2 to 1:2.4.
Claim 5
Dependent Claim
18 words
The process of claim 1 for preparing hydroxy-aluminum chloride polymer wherein the aluminum chloride is aluminum chloride hexahydrate.
Claim 6
Dependent Claim
19 words
The process of claim 1 for preparing hydroxy-aluminum chloride polymer wherein the temperature varies from 75° to 125° C.
Claim 7
Dependent Claim
22 words
The process of claim 1 for preparing hydroxy-aluminum chloride polymer wherein 10 mols to 100 mols water per mol urea is employed.
Claim 8
Dependent Claim
45 words
The process of claim 1 for preparing hydroxy-aluminum chloride polymer by reacting aluminum chloride, urea and water according to the following net reaction: AlCl.sub.3 + d(NH.sub.2).sub.2 CO + 3dH.sub.2 O → Al(OH).sub.2d (Cl).sub.(3-2d) + 2d(NH.sub.4 Cl) + dCO.sub.2 wherein d varies from 0.1 to 1.4.
Claim 9
Dependent Claim
12 words
The process of claim 7 wherein d varies from 0.5 to 1.25.
Claim 10
Dependent Claim
35 words
The process of claim 8 wherein d varies from 1 to 1.2, the reaction temperature varies from about 75° to 125° C, and 10 mols to 100 mols water per mol aluminum chloride is employed.
Claim 11
Dependent Claim
72 words
A process of preparing hydroxy-aluminum sulfate polymer which comprises reacting urea and aluminum sulfate wherein the molar ratio of aluminum sulfate to urea varies from about 1:1 to 1:2.5 and the molar ratio of aluminum to hydroxyl in the hydroxy-aluminum polymers varies from about 1:1 to 1:2.5, at a temperature of about 50° to 150° C, in aqueous solution medium of about 1 mol to 1000 mols water per mol of urea.
Claim 12
Dependent Claim
72 words
A process of preparing hydroxy-aluminum sulfate polymer which comprises reacting urea and aluminum sulfate wherein the molar ratio of aluminum sulfate to urea varies from about 1:1 to 1:2.5 and the molar ratio of aluminum to hydroxyl in the hydroxy-aluminum polymers varies from about 1:1 to 1:2.5, at a temperature of about 50° to 150° C, in aqueous solution medium of about 1 mol to 1000 mols water per mol of urea.
Claim 13
Dependent Claim
43 words
The process of claim 10 for preparing hydroxy-aluminum sulfate polymer wherein the molar ratio of aluminum sulfate to urea varies from about 1:2 to 1:2.4 and the molar ratio of aluminum to hydroxyl in the hydroxy-aluminum polymer varies from about 1:2 to 1:2.4.
Claim 14
Dependent Claim
24 words
The process of claim 10 for preparing hydroxy-aluminum sulfate polymer wherein the aluminum sulfate is Al 2 (SO 4 ) 3 ·18H 2 O.
Claim 15
Dependent Claim
19 words
The process of claim 10 for preparing hydroxy-aluminum sulfate polymer wherein the temperature varies from 75° to 125° C.
Claim 16
Dependent Claim
22 words
The process of claim 10 for preparing hydroxy-aluminum sulfate polymer wherein 10 mols to 100 mols water per mol urea is employed.
Claim 17
Dependent Claim
46 words
The process of claim 10 for preparing hydroxy-aluminum sulfate polymer by reacting aluminum sulfate, urea and water according to the following net reaction: Al.sub.2 (SO.sub.4).sub.3 + x(NH.sub.2).sub.2 CO + 3xH.sub.2 O → 2Al(OH).sub.x (SO.sub.4).sub.(3-x)/2 + x(NH.sub.4).sub.2 SO.sub.4 + xCO.sub.2 wherein x varies from 0.1 to 2.8.
Claim 18
Dependent Claim
12 words
The process of claim 15 wherein x varies from 1 to 2.5.
Claim 19
Dependent Claim
34 words
The process of claim 16 wherein x varies from 2 to 2.4, the reaction temperature varies from about 75° to 125° C, and 10 mols to 100 mols water per mol urea is employed.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |