IN278566: A process for production of tungstic acid from hard tungsten-copper alloy scrap
Abstract
The invention relates to a process for producing tungstic acid from hard tungsten copper (W-Cu) alloy scrap employing electrolysis, solvent extraction and precipitation processes. The electrolysis process was used to dissolve the hard W-Cu alloy scrap in Ammonium Hydroxide solution with the additive. The invention is useful for dissolving hard W-Cu alloy scrap housed in the anode support cylindrical system. The hard W-Cu alloy scrap pieces in contact with graphite rod were used as anode. The stainless steel rod was used as cathode. The copper dissolved in the electrolyte solution was separated by solvent extraction process using the organic solvent LIX 84. The tungsten left behind in the electrolyte solution was recovered as tungstic acid by the precipitation process using hydrochloric acid solution.
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