US4117106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing bayerite
Assignee: Vista Chemical Co
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Filing: 1977-08-01
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Granted: 1978-09-26
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Expires: 1997-08-01
Abstract
Abstract Aluminum alkoxides are hydrolyzed at low temperatures using high injection velocities and are then vacuum stripped at or below 80° C to produce β-alumina trihydrates in large proportion. The β-alumina trihydrate can then be converted to eta alumina.
Inventors
- 👤 Larry L. Bendig
- 👤 John F. Scamehorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:15
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36; C01P; C01P2002/00; C01P2002/60; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/14; C01P2006/16; C01P2006/80
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A method for enhancing bayerite production during the low temperature hydrolysis of aluminum alkoxides comprising injecting aluminum alkoxides into water or an aqueous solution at a temperature of from about 100° F to about 160° F wherein said injection is carried out at an injection velocity equal to or greater than 100 feet per second as determined using the formula V=F/ρA wherein A is orifice area in square feet, ρ is density in pounds per cubic foot, and F is flow rate in pounds per second, by-products and adsorbed alcohols are removed, and bayerite is recovered without an ageing period.
Claim 2
Independent Claim
100 words
A method for enhancing bayerite production during the low temperature hydrolysis of aluminum alkoxides comprising injecting aluminum alkoxides into water or an aqueous solution at a temperature of from about 100° F to about 160° F wherein said injection is carried out at an injection velocity equal to or greater than 100 feet per second as determined using the formula V=F/ρA wherein A is orifice area in square feet, ρ is density in pounds per cubic foot, and F is flow rate in pounds per second, by-products and adsorbed alcohols are removed, and bayerite is recovered without an ageing period.
Claim 3
Dependent Claim
38 words
A method as described in claim 1 wherein the hydrolysis product is extracted to remove alcohols having 6 or more carbon atoms, said extraction carried out at a temperature of from about 100° F to about 160° F.
Claim 4
Dependent Claim
36 words
A method as described in claim 2 wherein the extracted hydrolysis product is vacuum stripped to remove the extraction agent, said vacuum stripping taking place at a temperature from about 100° F to about 160° F.
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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |