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Sodium Thiosulfate Gold Recovery

PCT application WO 0065112 teaches the recovery of gold from an aqueous ammoniacal thiosulfate solution by liquidliquid or liquidsolid extraction with an extraction reagent having either a guanidyl functionality or quaternary amine functionality mixed with a weak organic acid

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Thiosulphate Leaching  Mining  SGS
Thiosulphate Leaching Mining SGS

Thiosulfate leaching offers a number of benefits related to gold recovery yields and environmental concerns Thiosulfate leaching of gold ores has great potential to reduce the impact on the environment Unlike cyanide which is highly toxic the chemicals used in the thiosulfate leaching process are benign

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Thiosulfate leaching of goldA review  ScienceDirect
Thiosulfate leaching of goldA review ScienceDirect

Cementation or metal displacement resins and to a limited extent activated carbon can be used to recovery gold from thiosulfate solutions The use of resins to recover gold from solution appears to show some promise however more work is required to develop suitable elution and recovery methods and greater selectivity over copper

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Treatment of a Polysulphide Ore by Ammoniacal
Treatment of a Polysulphide Ore by Ammoniacal

Cyanidation delivered a gold recovery of 806 at 2 4 hours of agitation whereas ammoniacal thiosulfate leaching achieved an 809 of gold recovery in only one hour of agitation Then the ammoniacal thiosulfate solutions obtained were submitted to five gold

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Recovery of Gold from Thiourea Thiocyanate or
Recovery of Gold from Thiourea Thiocyanate or

Abstract Sodium borohydride can be used as an efficient agent for reducing gold and silver in acidic solutions of thiourea thiocyanate thiosulfate acid chloride and acid nitrate The AuI ion is reduced to metallic gold in the form of very fine crystals as indicated by XRD and SEM analysis The reduction reaction is carried out at ambient temperature for a very short period of time 30 s

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Gold leaching by organic base polythionates new nontoxic
Gold leaching by organic base polythionates new nontoxic

The proposed method of the gold recovery comprises leaching with a solution of a mixture of sodium and ammonium hydrosulfite and thiosulfate by sorption of the thiosulfategold complex on a highly basic anion exchanger and by isolation of the highly basic anion exchanger the sorption being carried out 210 hours after the leaching

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Thiosulfate leaching of gold  A review  Request PDF
Thiosulfate leaching of gold A review Request PDF

For the fresh ore the gold recovery was 75 in two hours The flotation concentrate which is high gold content the gold recovery using thiosulfate in 24 hours was between 88 and 91

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Thiosulphate DroppedTesting for PM  Page 2  Gold
Thiosulphate DroppedTesting for PM Page 2 Gold

Jan 11 2012 · For instance NaSx sodium poly sulfide which dissolves gold sulfides can be followed by sodium thiosulfate What you are doing is OK for now Eventually your process will evolve to a more complete recovery

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Sodium thiosulfate  Wikipedia
Sodium thiosulfate Wikipedia

It is also often called sodium hyposulfite or hypo Sodium thiosulfate is used in gold mining water treatment analytic chemistry the development of silverbased photographic film and prints and medicine The medical uses of sodium thiosulfate include treatment of cyanide poisoning and pityriasis

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Sodium aurothiosulfate  AuH2Na3O6S4  PubChem
Sodium aurothiosulfate AuH2Na3O6S4 PubChem

Sodium aurothiosulfate AuH2Na3O6S4 CID 27176 structure chemical names physical and chemical properties classification patents literature biological

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Sodium Thiosulfate Rice Crystals 99 dechlorinate water
Sodium Thiosulfate Rice Crystals 99 dechlorinate water

sodium thiosulfate Sodium Thiosulfate has a variety of uses Also known as sodium subsulfite HYPO antichlor Thiosulfuric acid disodium salt Thiosulfuric acid H2S2O3 disodium salt Sodium Thiosulfate Rice Crystals 99 dechlorinate water Gold Recovery 55 Lb eBay

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Gold Sodium Thiosulfate  Allergic Contact Dermatitis
Gold Sodium Thiosulfate Allergic Contact Dermatitis

Gold sodium thiosulfate is a fairly common sensitizer with elicitation of symptoms linked to gold in jewelry occupational exposure to gold dental restorations goldplated intracoronary stents and previous rheumatoid arthritis treatment

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Recovery of Gold from Thiourea Thiocyanate or
Recovery of Gold from Thiourea Thiocyanate or

Sodium borohydride can be used as an efficient agent for reducing gold and silver in acidic solutions of thiourea thiocyanate thiosulfate acid chloride and acid nitrate The AuI ion is reduced to metallic gold in the form of very fine crystals as indicated by XRD and SEM analysis

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GOLD SODIUM THIOSULFATE  SmartPractice
GOLD SODIUM THIOSULFATE SmartPractice

Gold sodium thiosulfate is a fairly common sensitizer with elicitation of symptoms linked to gold in jewelry occupational exposure to gold dental restorations goldplated intracoronary stents and previous rheumatoid arthritis treatment

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GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS OF
GOLD RECOVERY FROM PRINTED CIRCUIT BOARDS OF

extract 88 of the gold while sodium and ammonium thiosulfate extracted 70 and 75 of the gold respectively The electrowinning tests showed a 94 recovery of the gold present in thiosulfate solutions

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Associated Sulfide Minerals in Thiosulfate Leaching of
Associated Sulfide Minerals in Thiosulfate Leaching of

The effects of some associated minerals on thiosulfate gold leaching were studied through thermodynamic analysis and leaching experiments on composite ore samples containing various minerals and a reference silicate gold ore

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US5536297A  Gold recovery from refractory carbonaceous
US5536297A Gold recovery from refractory carbonaceous

Finally the invention is directed to a process for the recovery of gold from a pressure oxidized slurry of a refractory sulfidic and refractory carbonaceous auriferous ore having pregrobbing characteristics due to the presence of organic carbon in which the oxidized ore slurry is mixed with a thiosulfate lixiviant to produce a leached slurry comprising a solid residue and a goldbearing leachate the leached slurry is

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Gold Recovery from PCBs with Thiosulfate as Complexing
Gold Recovery from PCBs with Thiosulfate as Complexing

The cyanidebased solution was able to extract 88 of the gold while sodium and ammonium thiosulfate extracted 70 and 75 of the gold respectively

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Gold Gold Sodium Thiosulfate Allergy
Gold Gold Sodium Thiosulfate Allergy

Feb 26 2019 · Symptoms of Gold Sodium Thiosulfate Allergy Thus gold is a potent sensitizer second only to nickel sulfate Dental patients with gold fillings or individuals who wear gold allergy show an incidence of allergy that is higher than normal which means the gold in

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process for thiourea and thiosulphate leaching  Gold
process for thiourea and thiosulphate leaching Gold

Nov 09 2015 · Sodium sulfideand ferrous sulfate will both precipitate gold from solution I run high iron content ore with Thiosulfate The only time there is ever a smell of rotten eggs is after the addition of sulfide as the reductant Even then if you havent dropped the PH to 8 the precipitation will be real slow and in very fine particles

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Sodium Thiosulfate Indications Side Effects Warnings
Sodium Thiosulfate Indications Side Effects Warnings

Jun 01 2019 · If you have any questions about sodium thiosulfate please talk with your doctor nurse pharmacist or other health care provider If you think there has been an overdose call your poison control center or get medical care right away

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Gold Cementation from Ammonium Thiosulfate
Gold Cementation from Ammonium Thiosulfate

Keywords gold zinc copper aluminium thiosulfate cementation 1 Introduction Ammonium thiosulfate leaching is an alternative gold extraction method to cyanidation because of its low toxicity1–7 However the gold recovery method from the leach solution was not widely studied In our study of gold leaching8 an

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Sodium thiosulfate  Wikipedia
Sodium thiosulfate Wikipedia

Sodium thiosulfate is used in gold mining water treatment analytic chemistry the development of silverbased photographic film and prints and medicine The medical uses of sodium thiosulfate include treatment of cyanide poisoning and pityriasis It is on the World Health Organizations List

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Gold recovery from refractory gold concentrates by
Gold recovery from refractory gold concentrates by

that gold recovery is difficult by thiosulfate leaching without any pretreatment and the recovery of gold only is 101 After roasting and oxidizing the gold leaching rate increases substantially The leaching rate of gold reaches 712 with the optimal leaching technological parameters Li et al

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Falsepositive patch test to gold thiosulfate  AAAAI
Falsepositive patch test to gold thiosulfate AAAAI

Patch tests to gold thiosulfate are no exception to this rule The abstract copied below is a selective illustration of patients who have a positive patch test to gold but can wear gold without difficulty Also this phenomenon with special reference to gold thiosulfate is discussed in

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Sodium Thiosulfate Formula Properties Risks and Uses
Sodium Thiosulfate Formula Properties Risks and Uses

Sodium thiosulfate is a component used as an alternative leaching agent to cyanide for the extraction of gold However it forms a strong soluble complex with the ions gold I Au S 2 OR 3 2 3

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Sodiumthiosulfate
Sodiumthiosulfate

Sodium thiosulfate is one component of an alternative lixiviant to cyanide for extraction of gold It forms a strong complex with goldI ions AuS 2 O 3 2 3 The advantage of this approach is that thiosulfate is essentially nontoxic and that ore types that are refractory to gold cyanidation eg carbonaceous or Carlin type ores can be leached by thiosulfate

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Gold Cementation from Ammonium Thiosulfate
Gold Cementation from Ammonium Thiosulfate

powder recovered 93 of gold at a MetalGold mass ratio of 50 Zinc might regenerate thiosulfate concentration and precipitate most of copper in the solution Aluminium precipitation might recover gold with less amount of copper deposition and some thiosulfate reduction

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Gold Recovery from Nickel Catalyzed Ammonium Thiosulfate
Gold Recovery from Nickel Catalyzed Ammonium Thiosulfate

The effect of various ionic species nickel copper ammonia and thiosulfate on gold recovery is then experimentally investigated on a 100 mgdm3 Au solution Investigating the best aurous thiosulfate eluant from the loaded resin is the secondary objective of this study

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THE INCREASED ACTIVITY IN THE DEVELOPMENT OF
THE INCREASED ACTIVITY IN THE DEVELOPMENT OF

concentration gold thiosulfate solutions eg leaching of gravity concentrates sulfide precipitation and copper cementation are alternative gold recovery options However unlike the resin technology which produces a high grade gold product sulfide precipitation and copper cementation produce a

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