Pressure reduction of copper(II) from highly acidic aqueous solutions containing arsenic

Wódka, Jerzy; Charewicz, Witold A.; Janicki, T.

doi:10.1016/s0304-386x(99)00015-8

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…Wódka et al 17 present an experimental investigation on the reduction of Cu(II) under hydrogen pressure from acidic solutions containing arsenic. The spent electrolyte studied was taken from the Glogow II smelter (Poland) and contained 170 g/L H 2 SO 4 , 40 g/L Cu, 6 g/L As, 14 g/L Ni, and no Sb or Bi.…”

Section: Coppermentioning

confidence: 99%

Hydrogen as a reducing agent: State-of-the-art science and technology

Luidold

Antrekowitsch

2007

JOM

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Hospitalized children who undergo painful procedures are more susceptible than others to experiencing iatrogenic effects, such as anxiety, pain, and severe stress. Clowns in clinical setting have been found to be effective in reducing children's experiences of these effects during hospitalization and before procedures. This article provides an overview of clowning in health care settings; reviews major studies conducted on clowning for hospitalized children, discussing evidence that clown interventions decrease pain and distress in pediatric patients; and concludes with a discussion of health care clowning as a profession.

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Section: Coppermentioning

confidence: 99%

Hydrogen as a reducing agent: State-of-the-art science and technology

Luidold

Antrekowitsch

2007

JOM

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“…The first part of this paper 6 indicated that the application of hydrogen as a reductant is under consideration for a number of metals such as Ni, [7][8][9][10][11][12] Cu, [13][14][15][16][17] Co, [18][19][20] Fe, 21,22 and Ag. 23 Hydrogen is a versatile reductant that can be used to produce many different metals and also some metalloids.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen as a reducing agent: Thermodynamic possibilities

Luidold

Antrekowitsch

2007

JOM

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“…Metal recovery from the leach liquors of ores=concentrates has been reported by several investigators (Forward and Halpern 1957;Togashi and Nagai 1983;Wodka et al 1999;Pandey et al 2000;Shibata et al 1987;Schavfelberger 1956). Work has also been reported on metal recovery under pressure in the absence of nucleating agent from the acidic and ammoniacal solutions (Volotinen and Taskinen 1991;Mc Cormick 1958;Togashi and Nagai 1983;Ipatiev and Teodovovich 1931;Peters and Von Hann 1964;Macgregor and Halpern 1958).…”

Section: Overview Of Recovered Copper Values 137mentioning

confidence: 87%

An Overview of Process Options and Behavioral Aspects of the Copper Values Recovered From the Copper Bleed Stream of a Copper Smelter Developed at the National Metallurgical Laboratory

Agrawal

Bagchi

Kumari

et al. 2009

Mineral Processing and Extractive Metallurgy Review

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In the present research, an effort has been made to prepare copper salt=powder from the copper bleed stream generated during the electrowinning of pure copper from the copper anode in a copper smelter. Various approaches have been opted for the complete recovery of copper values such as: evaporation-crystallization, electrolytic process, and direct hydrogen reduction. Physical and chemical properties of copper powder=salt produced from the large-scale experiments from actual plant and model solutions have been evaluated for P=M applications and compared with the standard properties. Thus, mixed crystal suitable for recycling back to the system as a makeup salt containing nickel in a tolerable range could be recovered by evaporation and crystallization of the bleed stream up, to 50%. Copper powder recovery by the electrolysis process at a current density of 700 A=m 2 was about 95%. Scanning electron microscope examination showed that the powder was dendritic in nature. On annealing, the purity of the copper powder was found to be 99.95%. The annealed powder had apparent density of 3.04 g=cc, hydrogen loss 0.72%, and acid insoluble as 0.27%. On compaction of <104-mm sized powder, the green density was found to be 8.7 g=cc. Similarly, the recovery of the copper powder obtained from the model copper solution by the hydrogen reduction process was found to be >99% and the annealed powder had an apparent density of 3.50 g=cc, flow rate 35.6 g=min, hydrogen loss 0.195%, purity 99.8%, and green density of 8.57 g=cc while the powder from the actual plant solution was found to have an apparent density of 3.49 g=cc, flow rate 46.0 g=min, hydrogen loss 0.598%, purity 99.4%, and green density 8.57 g=cc for the powder <100 mm in size. Thus, the properties of copper powder produced by hydrogen reduction and electrolytic route were compared and were found to be suitable for the P=M applications.

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Pressure reduction of copper(II) from highly acidic aqueous solutions containing arsenic

Cited by 9 publications

References 4 publications

Hydrogen as a reducing agent: State-of-the-art science and technology

Hydrogen as a reducing agent: State-of-the-art science and technology

Hydrogen as a reducing agent: Thermodynamic possibilities

An Overview of Process Options and Behavioral Aspects of the Copper Values Recovered From the Copper Bleed Stream of a Copper Smelter Developed at the National Metallurgical Laboratory

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