US4070448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing high purity aluminum chloride
Assignee: Alcoa Corp
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Filing: 1977-02-03
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Granted: 1978-01-24
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Expires: 1997-02-03
Abstract
Abstract Recovery of high purity aluminum chloride is achieved by use of a series of condensers wherein the first condenser is operated at a high temperature of 80°-110° C to insure minimum condensation of other metal chlorides such as titanium chloride, silicon chloride, or the like, while a second condenser operates at a much lower temperature of from 20°-50° C to trap all impurities while reducing the chloride losses to a minimum. The product of the first condenser may then be used as a feed for the electrolytic reduction of aluminum chloride to metallic aluminum.
Inventors
- 👤 Stanley C. Jacobs
- 👤 Larry K. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
B; B01; B01D; B01D7/00; B01D7/02; B01J; B01J8/00; B01J8/005; B01J8/006; B01J8/18; B01J8/24; B01J8/26; B01J8/28; C; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/58; C01F7/62; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00132; C01P; C01P2004/00; C01P2004/50; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/80; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
In the process for the recovery of high purity particulate aluminum chloride from a chlorinator by the condensation of hot aluminum chloride vapors the improvement which comprises: a. introducing the aluminum chloride vapors at an entrance velocity of 18 to 90 meters/sec into a first fluidized bed having a particle size range of 1-500 microns of aluminum chloride particles maintained at a temperature of 80°-110° C; b. removing solid particles of aluminum chloride from the fluidized bed at a point adjacent the bottom of the fluidized bed; and c. passing the remaining uncondensed gases and vapors from said first fluidized bed at an entrance velocity of 18-90 meter sec into a second fluidized bed of aluminum chloride particles having a particle size range of 1-500 microns and maintained at a temperature of 20°-50° C to recover the remainder of the chloride values from said gases and vapors.
Claim 2
Dependent Claim
147 words
In the process for the recovery of high purity particulate aluminum chloride from a chlorinator by the condensation of hot aluminum chloride vapors the improvement which comprises: a. introducing the aluminum chloride vapors at an entrance velocity of 18 to 90 meters/sec into a first fluidized bed having a particle size range of 1-500 microns of aluminum chloride particles maintained at a temperature of 80°-110° C; b. removing solid particles of aluminum chloride from the fluidized bed at a point adjacent the bottom of the fluidized bed; and c. passing the remaining uncondensed gases and vapors from said first fluidized bed at an entrance velocity of 18-90 meter sec into a second fluidized bed of aluminum chloride particles having a particle size range of 1-500 microns and maintained at a temperature of 20°-50° C to recover the remainder of the chloride values from said gases and vapors.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein from 5-20% by weight of the total first fluidized bed of aluminum chloride particles are removed from adjacent the bottom of said first bed each hour.
Claim 4
Dependent Claim
32 words
The process of claim 2 wherein from 5-20% by weight of the total second fluidized bed of aluminum chloride particles are removed from adjacent the bottom of said second bed each hour.
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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |