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| Number | Title | Issue Date |
| 7824468 | Carbothermic processes A carbothermic process for producing an aluminium carbide containing mass by injecting carbon and alumina into molten aluminium superheated above 1400° C. The carbon reacts with molten aluminium to produce an aluminium carbide and alumina mass. The mass can be heat... | 11/02/2010 |
| 6565733 | Method and apparatus for the production of aluminium Method for the production of primary aluminium from alumina comprising the step of converting alumina into aluminium sulfide (Al2 S3) and subsequently the separation of aluminium from aluminium sulfide wherein the conversion of alumi... | 05/20/2003 |
| 6361580 | Method for production of aluminum A continuous process for the production of elemental aluminum is described. Aluminum is made from aluminum oxide and a reducing gas such as a light hydrocarbon gas or other reducing gas, for example hydrogen. In the process, a feed stream of the aluminum ... | 03/26/2002 |
| 6086655 | Production of metal such as aluminum, magnesium, silicon from metal oxide compounds A thermo-mechanical process for producing aluminum or other metals from aluminium or metal compounds, is described, whereby aluminum oxide or similar aluminium compounds or similar other metal compounds, are heated by friction generated by mechanical forc... | 07/11/2000 |
| 6010749 | Process for the production of volatile metal A metal volatilization process is described in which metal oxide pieces in a reaction chamber are reduced to form reduced metal and at least a portion of that metal is volatilized and used for coating a variety of substrates, including those which are sus... | 01/04/2000 |
| 5723097 | Method of treating spent potliner material from aluminum reduction cells A method of treating spent potliner material from aluminum reduction cells is disclosed. The spent potliner material is introduced into a sulfuric acid digester to produce a gas component including hydrogen fluoride and hydrogen cyanide and a slurry compo... | 03/03/1998 |
| 5332421 | Process for extracting aluminum from ore A method of smelting aluminum from aluminum ore wherein the powdered ore is mixed with a flux containing substantial amounts of borax, sodium bicarbonate and a copper compound, preferably copper sulphate. The mixture is placed in a suitable vessel, prefer... | 07/26/1994 |
| 5279645 | Bauxite processing An improved process for the removal of organic matter from bauxite ore containing gibbsite comprises heating the ore under roasting conditions including a roasting temperature of from about 400° C. to about 600° C. with oxygen-containing roasting gas ha... | 01/18/1994 |
| 4447262 | Destruction of halogen-containing materials An organic waste containing halogen is destroyed by treatment in a molten salt pool comprising a mixture of a basic alkaline earth metal compound with an alkaline earth metal halide. An oxygen-containing gas is introduced into the pool containing the wast... | 05/08/1984 |
| 4243411 | Reduction of metal sulfides A method for the recovery of a desired metal (e.g., copper) from its sulfide ore by reaction with process metal (e.g., aluminum) capable of forming at least a high sulfide and subsulfide compound. The aluminum subsulfide compound is reacted with the coppe... | 01/06/1981 |
| 4036637 | Separation of zirconium-hafnium by nitride precipitation A method for the separation of a light reactive metal (e.g., zirconium) from a heavy reactive metal (e.g., hafnium) by forming insoluble nitrides of the metals in a molten metal solvent (e.g., copper) inert to nitrogen and having a suitable density for th... | 07/19/1977 |
