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US3816093A
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Halogenating method of reducing iron and titanium content of alumina-silica ore
Assignee: Ethyl Corp
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Filing: 1972-05-11
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Granted: 1974-06-11
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Expires: 1992-05-11
Abstract
Abstract A method of beneficiating or upgrading aluminum-silicate or alumina-silica ores, especially clays containing substantial amounts of minerals such as kyanite, diaspore and the like, wherein the ore is heated in a non-fluidized bed to a relatively high temperature in the presence of a carbonaceous reducing agent and treated with chlorine and/or bromine.
Inventors
- 👤 C Hildreth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:54
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/08; C22B21/00; C22B21/0007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
The combination of claim 1 in which the ore is diaspore, the particle size is less than 200 mesh, the heating temperature is about 750* C and is conducted in the presence of chlorine.
Claim 2
Dependent Claim
54 words
In the process of manufacturing an aluminum-silicon alloy by carbothermic reduction of a clay, the improvement according to which the clay contains over 50 percent alumina as well as large quantities of iron and titanium, and the clay is previously treated to reduce its iron and titanium content by the method of claim 1.
Claim 3
Dependent Claim
40 words
In the process of manufacturing an aluminum-silicon alloy by carbothermic reduction of a diaspore clay or ore, the improvement according to which the diaspore is previously treated to reduce its iron and titanium content by the method of claim 2.
Claim 4
Independent Claim
96 words
A method of reducing the iron and titanium content of an alumina-silica ore containing over 50 percent alumina as well as substantial amounts of iron and titanium, said method being characterized by providing such ore in a particle size smaller than 100 mesh and mixed with an amount of carbon in excess of that needed to completely reduce its iron and titanium content, and heating such mixture to a temperature between about 650* and 1,200* C in the presence of bromine to cause most of the iron and titanium in the ore to be driven off.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |