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Separating nickel metal sheet from spent nickel paste used to industrial waste material containing nickel, involves treating nickel paste with reductant, treating slurry with sulfuric acid, adding hydrogen peroxide to solution, and purifying nickel sulfate in leachate using sodium hydroxide
2024-12-19
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Method for separating cobalt metal sheet from secondary sources useful for cathode material of lithium-ion batteries, involves treating slurry of reduced cobalt alloy with sodium borohydride, washing slurry with sulfuric acid, treating with hydrogen peroxide, and treating with hydrazine hydrate
2024-12-16
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Method for recovering rare earth metals (REMs) from phosphogypsum industrial waste, involves drying phosphogypsum moisture, leaching dried phosphogypsum with ferric chloride and hydrochloric acid, stirring mixture at particular temperature to facilitate displacement reaction
2024-12-04
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Extracting cobalt precursor from cobalt-containing industrial inorganic byproduct, has extracting metals from byproduct into sulfate forms to obtain metal sulfate solution, and selectively removing non-cobalt metal impurities
2024-10-23
