Meshram, Pratima and Sinha, Manish K and Sahu, S K and Khan, Pritam and Pandey, B D and Mankhand, T R (2013) Solvothermal synthesis of high value copper powder from copper bleed solution of an Indian copper smelter. Powder Technology, 233 (IF-2.265). pp. 335-340.
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Recovery of copper powder from copper bleed solution (CBS) of a copper smelter by solvothermal route has been investigated. After removing sulphuric acid by solvent extraction with tri-iso-octyl-amine, copper from the acid depleted CBS was recovered by using Versatic 10 acid as an extractant in kerosene. In 1.5 M Versatic 10 acid 29.8 g/L copper was loaded at an equilibrium pH of 4.25. During the hydrogen stripping, a 97% copper powder was recovered from the loaded Versatic 10 acid solution at 20 bar hydrogen pressure and 403 K temperature. The solvothermal synthesis of copper powder followed nucleation and growth kinetic model with activation energy value of 145 kJ/mol. Stripping of copper powder could also follow the chemical control kinetic model with lower value of activation energy (66 kJ/mol). The copper powder as characterized by SEM exhibited globular particles of 0.25–0.5 μm size and was found to be suitable for P/M applications.
|Uncontrolled Keywords:||Copper bleed solution,Solvent extraction,Versatic 10 acid, Autoclave Solvothermal synthesis|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Mrs Pratima Meshram|
|Deposited On:||23 Oct 2012 11:33|
|Last Modified:||27 Dec 2013 17:54|
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