A new technique for extraction of platinum group metals by pressure cyanidation

Chen, Jing; Huang, Kun

doi:10.1016/j.hydromet.2006.03.041

Cited by 127 publications

(64 citation statements)

References 2 publications

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“…carrier as well as catalyst. The platinum dissolution process is often carried out in cyanate [8,9] or chloride [10][11][12] containing media as complex forming ligands.…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

Wojnicki

Socha

Fitzner

2017

Reac Kinet Mech Cat

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In this paper, results showing the possibility of activated carbon application in platinum recovery from aqueous solution are presented. The studies were performed with the commercially available activated carbon, and the results can be easily transferred directly to the industry. The influence of pH, mixing rate, and amount of activated carbon as well as platinum(IV) initial concentration on the rate of adsorption was investigated. It was shown that after adsorption platinum is present on the surface of activated carbon in two oxidation states, ?2 and ?4, where shares of those forms are equal to 47 and 53%. Moreover, the enthalpy and entropy of activation were determined and are equal to 16.14 ± 075 kJ mol -1 and 42.19 ± 0.28 J mol -1 K -1 .

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“…carrier as well as catalyst. The platinum dissolution process is often carried out in cyanate [8,9] or chloride [10][11][12] containing media as complex forming ligands.…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

Wojnicki

Socha

Fitzner

2017

Reac Kinet Mech Cat

View full text Add to dashboard Cite

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“…Solvent extraction, ion exchange, membrane separation and adsorption have been developed for the recovery of platinum and palladium from aqueous solution, [6]. However, adsorption had been proven to be an effective approach for recovery of platinum and palladium from dilute solutions [7]- [11].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Platinum and Palladium Ions from Aqueous Solution Using Grape Stalk Waste

Mavhungu¹,

Mbaya²,

Moropeng³

2013

IJCEA

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Abstract-Platinum and palladium were adsorbed onto grape stalk and activated grape stalk prepared by chemical activation process using phosphoric acid. The amount of platinum and palladium uptake (adsorbent loading) was quantified. Influence of contact time, pH were investigated. The results showed that the adsorption of metal ions is pH dependent. The presence of base metal ions in the solution did not affect the process of adsorption of palladium and platinum. Effect of temperature was taken into account during the determination of isotherms. Langmuir and Freundlich isotherm models were applied and compared.

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“…As the barren leached heaps are to be considered for mine backfill, the heaps are foreseen to be temporary heaps with loading and unloading onto permanent well-engineered leach pads. Furthermore, PGMs can be recovered from pregnant cyanide leach solutions via adsorption to carbon and subsequent elution, zinc cementation and ion exchange resins (Chen and Huang, 2006;Torres and Costa, 1997;Bruckard et al 1992). This paper will investigate the application of sequential stage heap leach technology to low-grade Platreef concentrates.…”

Section: Introductionmentioning

confidence: 99%

Assessing a two-stage heap leaching process for Platreef flotation concentrate

2012

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Samples of low-grade flotation concentrate derived from Platreef ore were treated with a two-stage heap leach process to determine the potential to run this process parallel to to the convential concentrate-smelt-refine process for extracting platinum group metals, thereby adding value to the convential process via economic treatment of low-grade materials. Using bench-scale columns, a first stage bioleach achieved extractions of 91.1% Cu, 98.5% Ni and 83.5% Co in a space of 88 days at a temperature of 65°C. Samples of residual concentrate from this process were similarly treated via columns in a second stage leach using cyanide solution, achieving extractions of up to 96.5% Pd, 97.5% Au and 35% Pt in a space of 45 days at 50°C. Mineral liberation analysis of a sample of concentrate from the cyanide leach experiment revealed that the bulk of the remaining Pt was in the form of sperrylite which appeared to leach very slowly in cyanide solution. Further to this, analysis of the cyanide leachate solution showed high levels of thiocyanate

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A new technique for extraction of platinum group metals by pressure cyanidation

Cited by 127 publications

References 2 publications

Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

Recovery of Platinum and Palladium Ions from Aqueous Solution Using Grape Stalk Waste

Assessing a two-stage heap leaching process for Platreef flotation concentrate

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