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AssigneeDeepsea Ventures, Inc.
InventorsPaul H. Cardwell, William S. Kane
Estimating the term…
This invention provides a halidation process for obtaining a high purity manganese oxide from a manganiferous ore, while reclaiming a substantial portion of the hydrogen halide reagent. The process comprises halidating the ore with a hydrogen halide and leaching to form the corresponding halogen and an aqueous solution comprising dissolved manganese halide and ferric halide. The hydrogen halide can be in the gaseous state and/or dissolved in the aqueous leach solution. The manganese halide and the ferric halide are preferably individually separated from the leach solution by crystallization and by selective extraction, respectively. The crystallized manganese halide is reacted with water at a temperature of from about 400.degree. C to about 700.degree. C to yield the corresponding hydrogen halide, which is recycled, and manganese oxide. In one embodiment, a concentrated leach solution is formed at a temperature of at least about 90.degree. C using at least some gaseous hydrogen halide as the reagent, the solution having a concentration of manganese halide greater than the saturation concentration at ambient temperaures. The solution is then cooled to ambient and the manganese halide crystallized out. The ferric halide is then extracted from the solution. In a second embodiment, the ferric halide is first extracted from the leach solution and the manganese halide is then crystallized by evaporating the gaseous solution. If other nonferrous metal values are present, these can be removed by precipitation or cementation. Any remaining aqueous liquid is preferably recycled.
A process for the preparation of relatively pure manganese oxide from manganese oxide ore, the ore comprising manganese and iron values, the process comprising 1) halidating the ore with a hydrogen halide selected from the group consisting of hydrogen chloride, hydrogen bromide and hydrogen iodide to form the corresponding elemental halogen and leaching with an aqueous solution to form an aqueous leach solution comprising the halides of divalent manganese and of trivalent iron;
A process for the preparation of manganous oxide from a manganese oxide ore, the ore comprising primary proportions of manganese and iron values, the process comprising 1) contacting the manganese oxide ore with hydrogen halide selected from the group consisting of hydrogen chloride, hydrogen bromide and hydrogen iodide, to form the corresponding elemental halogen and leaching with an aqueous solution to form an aqueous leach solution comprising the halides of manganese and iron;
A process for the preparation of manganese oxide from a manganese oxide ore, the ore comprising primary proportions of manganese and iron values, the process comprising:
A process for the preparation of relatively pure manganese oxide from a manganese oxide ore, the ore comprising manganese and iron values, the process comprising 1) halidating the ore with hydrogen chloride and leaching with an aqueous solution at a temperature of at least about 90.degree. C so as to form a hot concentrated aqueous solution comprising manganous chloride and ferric chloride;
A process for the preparation of relatively pure manganese oxide from a manganese oxide ore, the ore comprising manganese values and iron values, the process comprising 1) halidating the ore with a gaseous hydrogen halide selected from the group consisting of hydrogen chloride, hydrogen bromide and hydrogen iodide at a temperature of at least about 200.degree. C;
A process for obtaining relatively pure manganous halide from a manganese oxide ore, the ore comprising manganese values and iron values, the process comprising:
Dependencies are inferred from the claim text.