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| Number | Title | Issue Date |
| 6773483 | Sodium purification method The invention relates to a technical sodium purification method consisting of placing liquid sodium in contact at a temperature greater than or equal to 150° C., inside a static mixer, with an inert gas stream with respect to the sodium containing the stoechiometri... | 08/10/2004 |
| 6685764 | Processing molten reactive metals and alloys using fluorocarbons as cover gas This invention relates to a method for preventing the ignition of molten magnesium by contacting the molten magnesium with a gaseous mixture comprising a fluorocarbon selected from the group consisting of perfluoroketones, hydrofluoroketones, and mixtures... | 02/03/2004 |
| 6245211 | Process for obtaining titanium or other metals using shuttle alloys The present invention relates to a process for obtaining metals from oxides using shuttle alloys, particularly titanium metal from titanium dioxide in the form of illmenite rutile. The process can be adapted to obtain elemental metal or alloys of metals s... | 06/12/2001 |
| 6086652 | Method and apparatus for initial purification of liquid metal heat exchange fluid A method for removing oxides from a liquid metal heat exchange fluid following the initial startup of the heat exchange system fixes oxygen by locating an oxygen scavenging material in a drain tank. During initial fabrication and periods of maintenance me... | 07/11/2000 |
| 5785732 | process and apparatus for recovering Na from spent NaS cells A process for recovering Na from a spent NaS cell, includes the steps of forming an opening in a spent NaS cell, flowing down molten Na from an interior of the NaS cell through the opening in a heating oil vessel, passing the molten Na through a filter pl... | 07/28/1998 |
| 5019158 | Process for the separation of calcium and nitrogen from lithium A process is disclosed for separating calcium and nitrogen from lithium, in which alumina is added to molten lithium and reacts to produce aluminum and lithium oxide. The aluminum reacts with the nitrogen in the lithium to produce insoluble aluminum nitri... | 05/28/1991 |
| 4830816 | Getter trap for removing hydrogen and oxygen from a liquid metal A getter trap to remove hydrogen and oxygen from a liquid metal, such as liquid sodium, includes an elongated, closed housing having an inlet at one end thereof and an outlet at the other end. A getter material is randomly diposed within the housing compr... | 05/16/1989 |
| 4765831 | Process for production of alkaline earth metal by carbothermic production of alkaline earth metal aluminide and stripping of alkaline earth metal from alkaline earth metal aluminide with nitrogen stripping agent An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearin... | 08/23/1988 |
| 4738716 | Process for purifying lithium The invention relates to a process for purifying lithium in which the lithium is melted in an inert atmosphere. The molten lithium is then maintained at a temperature of 400° to 700° C. under a pressure of less than 10 Pascal while agitating the molten ... | 04/19/1988 |
| 4735654 | Process for reduction of metal compounds by reaction with alkaline earth metal aluminide An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearin... | 04/05/1988 |
| 4721525 | Extraction process for removing metallic impurities from alkalide metals A development is described for removing metallic impurities from alkali metals by employing an extraction process wherein the metallic impurities are extracted from a molten alkali metal into molten lithium metal due to the immiscibility of the alkali met... | 01/26/1988 |
| 4714494 | Trough shear diffusor apparatus for fluxing molten metal and method A system for purification of molten metal to remove impurities such hydrogen gas and alkali elements therefrom is disclosed which comprises passing the molten metal through an enclosed passageway at a velocity of at least about 0.1 cm/sec and introducing ... | 12/22/1987 |
| 4680055 | Metallothermic reduction of rare earth chlorides Rare earth chlorides and oxychlorides can be reduced to substantially pure rare earth metals by a novel, high yield, metallothermic process. The rare earth chloride feedstock is dispersed in a vessel containing a suitable molten chloride salt bath and a m... | 07/14/1987 |
| 4441923 | Integrated process using non-stoichiometric sulfides or oxides of potassium for making less active metals and hydrocarbons Disclosed is a combinative integrated chemical process using inorganic reactants and yielding, if desired, organic products. The process involves first the production of elemental potassium by the thermal or thermal-reduced pressure decomposition of potas... | 04/10/1984 |
| 4105440 | Process for reducing metal halides by reaction with calcium carbide A metal halide is reduced by reacting it with calcium carbide in a bath in which the calcium carbide is dissolved in a mixture of a halide of at least one alkali metal, specifically sodium, potassium, rubidium and/or cesium, with a halide of at least one ... | 08/08/1978 |
| 3941586 | Method and apparatus for regenerating cold traps within liquid-metal systems Oxide and hydride impurities of a liquid metal such as sodium are removed from a cold trap by heating to a temperature at which the metal hydroxide is stable in a molten state. The partial pressure of hydrogen within the system is measured to determine if... | 03/02/1976 |
