Home crushing machine use of thiosulfate in copper extraction

Use of thiosulfate in copper extraction

  • The oxidation of thiosulfates with copper sulfateJan 01, 2009· Abstract. This paper presents the transformation of thiosulfate using Cu (II) salts, such as copper sulfate, at pH between 4 and 5. The nature a

  • Chat Message

aspects of iridium extraction from chloride solutionspretreatment of solutions with sodium thiosulfate significantly increases iridium extraction. at medium acidity of 0. mol/l hcl and at introduction of iron powder in the amount of ·103 geq/l, extraction of iridium increases from 28 to 74%, at 1.65 mol/l hcl,oxygen module winkler titration labmost methods use a titration standard of 0.025 n sodium thiosulfate (na 22 n o 3) with an adjusted sample volume of between 03 ml depending if 1 or 2 ml of each reagent were added (see below) because at those proportions 1 ml of sodium thiosulfate is equal to 1 mg of)using nickel as a catalyst in ammonium thiosulfatefor extracting g from the copper bearing sulfide ore, a higher ammonia and thiosulfate concentrations were required with 0.1 mol/dm 3 of ni 2+. the ammonium thiuosulfate consumption with nickel as catalyst on the copper bearing sulfide ore was about kg/tore less than that using copper as catalyst.cn1024545a method for extracting g from thiosulfatethe method comprises the following steps that the ethanediamineas is adopted as ligand and forms ethanediamine copper (ii) complex ion with copper (ii) ion, the formed ethanediamine copper (ii)...author , , , , extraction and washing guide mit opencourseware extraction and washing guide overview this handout describes standard extraction and washing protocols that can be applied to virtually any crude reaction mixture. aqueous washings are done to remove water soluble impurities from organic products since normally the compound that youthe treatment of copperg ores by ammonium thiosulfateoct 01, 02· berezowsky and gormely (78) attributed this phenomenon to thiosulfate degradation; thiosulfate decomposition in the presence of copper causes the precipitation of copper sulfide, which coats the g particles and, thus, inhibits g leaching and recovery. therefore, an optimal leach time exists; the leach time should not be needlessly prolonged.cited by 9thiosulfate thiosulfate (s 2 o 2 3) (iupacrecommended spelling; sometimes thiosulphate in british english) is an oxyanion of sulfur.. the prefix thioindicates that the thiosulfate ion is a sulfate ion with one oxygen replaced by sulfur.thiosulfate has a tetrahedral molecular shape with c 3v symmetry. thiosulfate occurs naturally and is produced by certain biochemical processes.silver thiosulfate plant tissue culture protocolprepare a 0.02 m sts by slowly pouring ml of 0.1 m silver nitrate stock solution into 80 ml of 0.1 m sodium thiosulfate stock solution. the sts can be stored in the refrigerator for up to a month. however, preparation of the sts just prior to use is recommended.metalscyanides used in the extraction of g and silver from ores are substituted by thiosulfates, or if the same happens to electronic scrap or in metallic coating processes. this paper reports a study of the oxidation of thiosulfate, with oxygen using copper (ii) as a catalyst, at a ph between 4 and 5. the basicadsorption of copper from an ammoniathiosulfate media1. introduction. the study of copper adsorption on anion exchange resins has to do with the recovery of g as present in the solutions produced by leaching g ores in an ammoniathiosulfate media, where copper is the main impurity in the system. the ammoniathiosulfate system with copper offers high g leaching rates compared to the cyanide system, because the reaction is catalyzed bycyanide alternative leaching reagents for g recoveryhowever, by maintaining suitable concentrations of thiosulfate, ammonia, copper and oxygen in the leach solution, and consequently, suitable eh and ph conditions, thiosulfate leaching can be madeus4654078a method for recovery of precious metals fromprecious metals such as g and silver are recovered from difficulttotreat ores, especially those containing manganese and/or copper, by lixiviating the ores using copperammonium thiosulfate in...cited by 96

Chat Online

Advantages of use of thiosulfate in copper extraction

sodium thiosulphate wikidocsodium thiosulfate ( na 2 s 2 o 3) (sometimes spelled thiosulphate) is a colorless crystalline compound that is more familiar as the pentahydrate, na 2 s 2 o 3 5 h 2 o, an efflorescent, monoclinic crystalline substance also called sodium hyposulfite or hypo.. the thiosulfate anion isinnovations introduction to copper mining extractionhowever, by far the greatest extension in the use of copper resulted from michael faraday's discovery of electromagnetic induction in 31 and the way that the effect could be used to generate electricity. the same principle was used to develop electric motors. the electric lamp was invented by sir joseph swan in 60 and brought to a commercial design by thomas edison in 79.cn104789792b a kind of technique of nickel citratethe invention provides the new technology of a kind of nickel citrate catalysis leaching of g using thiosulfate.it is mainly characterized by using the catalysis of nickel citrate to replace traditional cuprammonium catalysis, i.e. adds nickel sulfate in leaching of g using thiosulfate ore pulp and citric acid (or sodium citrate) replaces copper sulphate and the addition of ammoniacalg leching from a saudi ore by the nonpollutingammonium hydroxide after 24 h. addition of copper(ii) as <0.2 mm only slightly enhanced the g leaching in the ammoniacal thiosulfate solution. g leaching drastically decreased as the concentration of copper(ii) increased 0.2 mm due to the degradation of s 2 o 3 2. keywords g, extraction, leaching, thiosulfateusing nickel as a catalyst in ammonium thiosulfatefor extracting g from the copper bearing sulfide ore, a higher ammonia and thiosulfate concentrations were required with 0.1 mol/dm 3 of ni 2+. the ammonium thiuosulfate consumption with nickel as catalyst on the copper bearing sulfide ore was about kg/tore less than that using copper as catalyst.the oxidation of thiosulfates with copper sulfatejan 01, 09· abstract. this paper presents the transformation of thiosulfate using cu (ii) salts, such as copper sulfate, at ph between 4 and 5. the nature and kinetics of this process were determined. in the experimental conditions employed, the reaction between thiosulfates and cu (ii) ions produces a precipitate of cus and the remaining sulfur is oxidized to sulfate, according to the following stoichiometry 1 mol thiosulfate reacts with 1 mol cu2+ and 3 mol h 2 o, generating 1 mol coppercited by an assessment of the environmental risks posed by the3. application of the extraction process to ores results in the production of waste liquors that contain a range of dissolved metals which are mobilised into solution through their affinity for thiosulfate. these include lead, copper , cobalt and zinc. the concentration and range of metals inthe increased activity in the development ofthe use of activated carbon loaded with copper cyanide (3) may provide a means for the simple replacement of cyanide with thiosulfate in existing processes and may reduce the regulation requirements for green field plants, though there would still be thegoing for g alternative processing methodsjan , · the breakthrough was the use of sulfite in the solution used to recover remove the g thiosulfate from the resin, which has now opened up a new area of recovery potential applications ofammoniacal thiosulphate leaching of g oreenvironmentally safe as compared to the toxic cyanide system for g extraction. in the present study, an attempt is made to assess the feasibility of ammoniacal thiosulphate leaching of g ore samples from two different mines namely akeshi and hishikari ofthiosulfate leaching of ga review sciencedirectfeb 01, 01· thiosulfate is considered a nontoxic alternative to cyanide and can leach g faster than cyanide. in the conventional cyanide process, the recovery of g and silver from ores is hindered by a variety of metal impurities like copper, arsenic, antimony, zinc and nickel, since these consume either cyanide or oxygen.cited by 568 oxidation of thiosulfate with oxygen using copperthiosulfate effluents are generated in the photography and radiography industrial sectors, and in a plant in which thiosulfates are used to recover the g and silver contained in ores. similar effluents also containing thiosulfate are those generated from the petrochemical, pharmaceutical and pigment sectors. in the future, the amounts of these effluents may increase, particularly if thethiosulphate leaching an alternative tocementation of g from thiosulphate leach solution onto copper metal powder, or some other reductant, following separation of solids and liquids in the leach slurry byfile size 4kb

More Information

The case of use of thiosulfate in copper extraction

sodium thiosulfate sodium thiosulfate (sodium thiosulphate) is an inorganic compound with the formula na 2 s 2 o 3. x h 2 o. typically it is available as the white or colorless pentahydrate, na 2 s 2 o 3 ·5h 2 o.the solid is an efflorescent (loses water readily) crystalline substance that dissolves well in water.. sodium thiosulfate is used in g mining, water treatment, analytical chemistry, the developmentsodium thiosulphate g leachingjun 02, · thiosulphate as an alternative to cyanide for g processing hypochlorite leaching of g ore treatment of a copper rich g ore by ammonia assisted cyanide leaching electrochemistry and mechanism of leaching g with ammoniacal thiosulphate recovery of g and silver from oxidation leach residues by ammoniacal thiosulphateiodometric titration of copperdownload determination of copper concentration reaction file, open it with the free trial version of the stoichiometry calculator. click n=cv button above s 2 o 3 2in the input frame, enter volume and concentration of the titrant used. click use button. read number of moles and mass of coppernuffield practical collection rsc educationcatalysing the reaction of sodium thiosulfate and hydrogen peroxide. microscale extraction of copper. in association with nuffield foundation. try this practical to reduce copper(ii) oxide to copper using hydrogen, revealing their positions in the reactivity series. includes kit list and safety instructions.an iodine / thiosulfate titrationthiosulfate solution should now be added dropwise, with thorough swirling. the endpoint of the titration is detected by a colour change from blueblack to colourless. note the burette reading. repeat the procedure, adding the sodium thiosulfate solution dropwise approaching theiii. chemical kinetics mit opencoursewarethiosulfate has been converted to tetrathionate, whereupon free iodine will start to form in the solution via reaction (1). because we know the amount of thiosulfate we added, we can determine the amount of iodine produced from reaction (1) stoichiometrically. when all the thiosulfate isgoing for g alternative processing methodsjan , · the breakthrough was the use of sulfite in the solution used to recover remove the g thiosulfate from the resin, which has now opened up a new area of recovery potential applications ofsodium thiosulfate sodium thiosulfate (sodium thiosulphate) is an inorganic compound with the formula na 2 s 2 o 3. x h 2 o. typically it is available as the white or colorless pentahydrate, na 2 s 2 o 3 ·5h 2 o.the solid is an efflorescent (loses water readily) crystalline substance that dissolves well in water.. sodium thiosulfate is used in g mining, water treatment, analytical chemistry, the developmentthiosulfate leaching of natural acanthite ore in copperthe use of cyanide is tightly regulated, thus forcing the industry to seek for alternatives. thiosulfate is currently the most promising alternative. the leaching chemistry of silver with thiosulfate is complex and maybe supplemented with additives such as ammonia, copper and even ethylenediaminetetraacetic acid.sodium thiosulfate for smallscale g leaching fromi am interested too. i like to use thiosulfate before, but i dont have enough knowledge about it yet. using thiosulfate is best for a copper rich g ore. it can be use as alternative in cyanide when processing a copper rich g ore. right now i was in a research how,and what is the best way to get rid of copperiii. chemical kinetics mit opencoursewarethiosulfate has been converted to tetrathionate, whereupon free iodine will start to form in the solution via reaction (1). because we know the amount of thiosulfate we added, we can determine the amount of iodine produced from reaction (1) stoichiometrically. when all the thiosulfate is consumed, free iodine starts to form in solution.thiosulfate leaching process for g extractionthiosulfate leaching appears to be one of the most promising alternatives to cyanidation. understanding g thiosulfate leaching system plays a crucial role in order to effectively extract g, in which the kinetics and equilibrium adsorption of thiosulfate, polythionates, g thiosulfate and copper

Get Price

Pre:circa cost of beneficiation and separation plantNext:process fro iron ore to concentrate ore to stell making

RELATED NEWS

iron ore in the lalrn superior regionis gold ore always yellow colourtype of lron orestages in iron ore purifiion processaltitude of koolan island iron ore mineiron ore mines in bihargross margin nickel oremetablew power iron ore minning project telanganamining product chrome oregraphite ore recovery of pgms
2020 Shandong Xinhai Mining Technology & Equipment Inc. sitemapsitemap
24 hour service line 137-9354-4858