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gold elution and recovering

Ion exchange adsorption and elution for recovering

2010-1-1  A new elution process for recovering gold thiosulfate from resins is described, and is based on the concept of synergistic ion exchange. In the presence of sulfite, Au(S 2 O 3) 2 3− is converted to Au(S 2 O 3)(SO 3) 3−, which has a reduced affinity for strong anion exchange resins and is shown to be readily eluted by weaker eluants, such as chloride.. Chloride has several

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Ion exchange adsorption and elution for recovering

A new elution process for recovering gold thiosulfate from resins is described, and is based on the concept of synergistic ion exchange. In the presence of sulfite, Au(S2O3)23− is converted to ...

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US Patent for Method for recovering precious metals

FIG. 7 shows the gold elution profiles obtained for a mixture of 0.2 M trithionate+0.2 M sulfite. The resin which had been pre-eluted in the presence of the trithionate undergoes elution earlier than the other sample resin, with the gold elution peak being after 1.3 bed volumes of solution, compared to 2.6 bed volumes, respectively.

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Factors affecting the elution of gold cyanide from ...

1994-1-1  This implies that the resistance to mass transfer was less profound under strong elution conditions. Keywords Activated carbon, gold cyanide, elution, cyanide, adsorption ~TRODUCTION The carbon-in-pulp (CIP) process is used world-wide as the main method for recovering gold from leached pulps.

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Recovery of gold from waste solutions using a new

2020-12-1  After the elution was completed, the gold ion concentration in the eluate was measured, and the RFB resin was washed with deionized water 3 times. In the first four cycles, the remaining gold ion concentration in the solution increased slightly and the gold ion concentration in the eluent decreased a little.

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Recovery of gold from solution by reduction

One method of recovering gold from such thiourea solutions involves neutralizing the acidified thiourea solution to a pH of about 6.5 which results in the precipitation of gold due to pH change. However, the method is non-selective and uneconomical due to the acid consumption necessary to readjust the solution pH if the thiourea is to be recycled.

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Recovery of gold from aqueous solutions - Canadian

1. A process for recovering gold from aqueous solutions containing gold and a thiourea or a thiosulfate solubilizing reagent, optionally with HCL; comprising: (a) contacting the aqueous gold solution with hydrogen by sparging or under pressures, with conditions selected so that the gold precipitates, and (b) recovering the gold precipitate. 2.

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THE RECOVERY OF PLATINUM, PALLADIUM, AND GOLD

2012-9-6  Gold was selectively recovered with the use of Minix, while effective recovery of gold, platinum, and palladium over the base metals, copper, and iron, was achieved with Amberlite PWA-5. Successful elution of these metal cyanides was possible from both Minix and Amberlite PWA-5, using a 2M potassium thiocyanate solution at ambient temperature.

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Gold Processing Methods Gold Ore Extraction

2021-1-22  Of all the methods of extracting gold processing it from its ore, I used a few to evaluate two principal flowsheets in this case study. The flowsheets utilized operations that involved flotation, cyanidation and gravity concentration. Tests that mirror each of these unit operations were utilized to evaluate the principal flowsheets. This page offers a comparative

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AARL Carbon Stripping System Operation: Elution ...

2021-1-22  Metallurgical ContentAcid WashingPreheat StageElution stageSequence ControllersDescription of the Carbon Stripping Process (See fig. 1)Acid Wash of CarbonTransfer to Elution ColumnReagent Addition and PreheatElution and Carbon CoolTransfer of Barren Carbon to the Regeneration Kiln HopperElectrowinningOperation of the Carbon Stripping

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Recovery of Gold from Thiosulfate Solutions and Pulps

2010-12-21  2.6.10 Summary of Published Work on Recovering Gold from Thiosulfate Solutions and Pulps 78 2.6.11 Elution of Metal Complexes from Anion Exchange Resins 81

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Recovery of gold from aqueous solutions - Canadian

1. A process for recovering gold from aqueous solutions containing gold and a thiourea or a thiosulfate solubilizing reagent, optionally with HCL; comprising: (a) contacting the aqueous gold solution with hydrogen by sparging or under pressures, with conditions selected so that the gold precipitates, and (b) recovering the gold precipitate. 2.

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THE RECOVERY OF PLATINUM, PALLADIUM, AND GOLD

2012-9-6  Gold was selectively recovered with the use of Minix, while effective recovery of gold, platinum, and palladium over the base metals, copper, and iron, was achieved with Amberlite PWA-5. Successful elution of these metal cyanides was possible from both Minix and Amberlite PWA-5, using a 2M potassium thiocyanate solution at ambient temperature.

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Elution Column Manufacturer Steel Fabrication

ELUTION COLUMNS. Among the major stainless steel products that STEGEL is provisioned to manufacture are elution columns, which are used for gold recovery. The use of elution columns in gold recovery is a cost-effective method of recovering gold from the sediment in mine dumps and other areas in which gold particles reside.

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Gold Processing Methods Gold Ore Extraction

2021-1-22  Of all the methods of extracting gold processing it from its ore, I used a few to evaluate two principal flowsheets in this case study. The flowsheets utilized operations that involved flotation, cyanidation and gravity concentration. Tests that mirror each of these unit operations were utilized to evaluate the principal flowsheets. This page offers a comparative review of gold

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Gold - Home DuPont

2021-1-21  Elution from the resin can be achieved with a more strongly adsorbed anion; zinc cyanide or thiocyanate are commonly employed. If NaOH is the desired eluent to recover the gold from the resin matrix, then AmberLyst™ A21 Weak Base Anion Resin should be chosen.

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US Patent for Method for recovering precious metals

The present disclosure is directed to a process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorbed trithionate to thiosulfate.

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Selective Elution of Mercury, Silver, and Gold From Strong ...

mercury, silver, and gold elution from five strong-base anion-exchange resins. Mercury Elution Mercury-, silver-, and gold-loaded IRA-430 resin was eluted with increasing con­ centration of dilute H2S04, Loaded resin was rolled 5 h with 100 mL of acid, the acid was removed, and elution was deter­ mined by isotope counting.

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Method for recovering precious metals and copper

Get details on patent AU2012271499 - Method for recovering precious metals and copper from leach solutions by Barrick Gold Corporation and more at IP in Australia

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TECHNICAL PAPER - Purolite

2020-2-10  Due to the strong affinity of these resins for gold-cyanide anions, elution of the loaded precious metals is difficult and a sulphuric acid/thiourea mixture is most commonly used. During elution, the negatively charged gold-cyanide complex is broken and a positively charged gold-thiourea complex is formed, as shown in Reaction 6.

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Characterization and recovery of gold associated with fine ...

2009-11-20  296 WORLD GOLD CONFERENCE 2009 chloride elution involved 50 g of carbon and 2 L of solution with remaining experiments being conducted using 25 g of carbon and 1 L of solution. 50 ml samples were taken periodically, from the elution trials with the volume of

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Gold Recovery Systems - Macrotec

Gold mining firms have started placing more emphasis on recovering gold from these carbon fines and woodchips due to increased pressure on gold mining firms to increase their recovery yield. Furthermore these firms and refineries are able to easily increase overall gold recovery by making small changes to their process to increase capture ...

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Elution Column Manufacturer Steel Fabrication

ELUTION COLUMNS. Among the major stainless steel products that STEGEL is provisioned to manufacture are elution columns, which are used for gold recovery. The use of elution columns in gold recovery is a cost-effective method of recovering gold from the sediment in mine dumps and other areas in which gold particles reside.

More

THE RECOVERY OF PLATINUM, PALLADIUM, AND GOLD

2012-9-6  Gold was selectively recovered with the use of Minix, while effective recovery of gold, platinum, and palladium over the base metals, copper, and iron, was achieved with Amberlite PWA-5. Successful elution of these metal cyanides was possible from both Minix and Amberlite PWA-5, using a 2M potassium thiocyanate solution at ambient temperature.

More

US Patent for Method for recovering precious metals

The present disclosure is directed to a process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorbed trithionate to thiosulfate.

More

Gold - Home DuPont

2021-1-21  Elution from the resin can be achieved with a more strongly adsorbed anion; zinc cyanide or thiocyanate are commonly employed. If NaOH is the desired eluent to recover the gold from the resin matrix, then AmberLyst™ A21 Weak Base Anion Resin should be chosen.

More

Method for recovering precious metals and copper

Get details on patent AU2012271499 - Method for recovering precious metals and copper from leach solutions by Barrick Gold Corporation and more at IP in Australia

More

Selective Elution of Mercury, Silver, and Gold From Strong ...

mercury, silver, and gold elution from five strong-base anion-exchange resins. Mercury Elution Mercury-, silver-, and gold-loaded IRA-430 resin was eluted with increasing con­ centration of dilute H2S04, Loaded resin was rolled 5 h with 100 mL of acid, the acid was removed, and elution was deter­ mined by isotope counting.

More

Selective Recovery of Gold from Electronic Waste

2019-8-8  Around 10% of the worldwide annual production of gold is used for manufacturing of electronic devices. According to the European Commission, waste electric and electronic equipment is the fastest growing waste stream in the European Union. This has generated the need for an effective method to recover gold from electronic waste. Here, we report a simple,

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Carbon Stripping – Denver Mineral Engineers

Many methods are used commercially for recovering gold and silver from loaded activated carbon. The major processes include: (1) Atmospheric Zadra Stripping (2) Pressurized Zadra Stripping (3) Anglo American Research Laboratory (AARL) Method (4) Alcohol Stripping (5) Micron Elution Procedure. Each process is briefly described.

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