The solvent extraction behaviour of solutions of versatic 10, naphthenic, 2bromo decanoic and 3,5diisopropylsalicylic acids in xylene towards a large number of metal cations is described. Pdf solvent extraction of copper, nickel and zinc by. Reagent improvements have led the way, but they have been accompanied by innovations in leaching. Extraction of heavy metals from aqueous solutions in a. The experimental parameters of solvent extraction were. It is a method of separating compounds on the basis of. Hence in this study experiments on separation of copper and nickel by solvent extraction have been performed using a modified aldoxime lix 664n as the extractant. Solvent extraction of metals by carboxylic acids sciencedirect. For the experimental conditions studied, cyanex 272 showed a good recovery of zn after the stripping stage using h2so4.
Solvent extraction of copper experiment oresome resources. Solvent extraction and electrowinning sxew is a twostage hydrometallurgical process that first extracts and upgrades copper ions from lowgrade leach solutions into a solvent containing a chemical that selectively reacts with and binds the copper in the solvent. Best results of cu extraction 98 % were achieved with extractant concentration of 5 % and ph 1. Various parameters for the extraction and separation of copper and zinc such as effect of ph, extractant concentration, phase ratio etc. Extraction and enrichment of copper by liquid emulsion. The concentration of ore is required and it is done by the froth flotation method. The commonest ore used in the extraction of copper is chalcopyrite cufes 2 also known as copper pyrites and other such sulfides. Nrrdonlyres62a4bda02b5f4579976168114b57a2a0 thesolve. Lix solvent extractants are recognized throughout the copper industry as the go to reagent for copper recovery. What is solvent extraction and why is it important.
This paper briefly discusses the modeling of solvent extraction circuits. Solvent extraction applied to the recovery of heavy metals. The taguchi method was used to determine the optimum conditions for solvent extraction process of copper ore in sulfuric acid solution. Ritcey for the purpose of providing information regarding the sx workshops and the volumes solvent extraction principles and applications to process metallurgy, revised edition 2006 by g. A high copper nickel ratio on the copper loaded organic is obtained by using an extra extraction stage in which copper crowds nickel from the loaded organic, i. Oct 28, 2018 this video explains about technique of solvent extraction which is used to purify and recover organicinorganic products or impurities in chemical synthesis it further explains distribution. Condition under which the reaction or the extraction process takes place also affects the separation. Wells center for the management, utilization and protection of water resources and department of chemistry, tennessee technological university, cookeville, tennessee 2. Copper can be extracted from nonsulfide ores by a different process involving three separate stages.
Analytical chemistry applications of solvent extraction names of participants ayesha saleem, namra babar, amina ashraf, ayesha bibi, kainat sajjad, wardah riaz roll numbers. Dissolution of copper from ore in sulfuric acid solvent, collection of solvent for cementation or solvent extraction remove copper from pregnant ieachate and remove some impurities remove copper from pregnantieachate and produce an electrolyte with sufficient copper content foreiectrowinning recover copper from the loaded electrolyte. Solvent extraction techniques are used in a wide variety of industries other than hydrometallurgy and a large range of extraction equipment has been developed over the years, many types having apparent advantages over mixersettlers from the point of. Solvent extraction research and development, japan, vol. It is a liquidliquid extraction process used to purify and concentrate solutions obtained from the leaching of ores. Maccabe thiele method was introduced in design of copper solvent extraction configuration when copper solvent extraction technology started to be used for highgrade copper ore. Students use solvent extraction to isolate and concentrate a solute. The solvent should not be toxic or corrosive as it can harm the extraction instruments. Concentration of the copper ii sulfate solution by solvent extraction. The solvent extraction process has been used for the production of copper first time in 1964 from dilute leach solutions containing low metallic values. Applications of solvent extraction linkedin slideshare. Design of copper solvent extraction configurations, book. Ritcey, and for distributing the proceedings of the international solvent extraction confernce, isec 2008.
Extractant for the solvent extraction of copper from chloride leach solutions. This paper briefly discusses the modeling of solventextraction circuits. This volume recognizes the growing role of solvent extraction and electrowinning technology in the world copper business. This study includes solvent extraction and electrowinning of copper from leaching process. Copper solvent extraction, dynamic simulation, first principles modeling, mixersettler. Diffraction standard jcpds file numbers for peak attributions are in the brackets. Separation of copper and nickel by liquidliquid extraction from aqueous solutions was studied using lix 664n in kerosene as solvent. There have been data on lix 984nc 9, lix 54 10, lix 84 11 for copper extraction by lems. Copper recovery using leach solvent extraction electrowinning technology. Concentration of the copperii sulfate solution by solvent extraction. To ensure consistent operation, a good understanding of the circuits operation and an ability to rapidly troubleshoot key parameters is required. Students construct graphs to represent data and analyse them for trends and patterns.
The liquid cation exchanger consisted of naphthenic acid dissolved in an inert carrier kerosene. Copper recovery using leachsolvent extractionelectrowinning technology. Copper recovery by solvent extraction has progressed from a technology with limited application for copper recovery from dilute sulfuric acid leach solution to a technology with broad application for copper recovery from a variety of leach solutions. With innovative products, global field support and industry leading technical expertise, basf mining solutions provides sustainable solutions which increase productivity, recovery and flexibility throughout the mining operations including leaching, solvent extraction, flotation, solidliquid separation and tailings management. Cole, purification of nickel by solvent extraction, ion. Trends covered are fiberreinforced plastic construction mixer box and settler designs, reverse flow settlers, and advanced mixer design.
Solvent extraction acts as a purification and concentration technique at the same time. Pdf this study includes solvent extraction and electrowinning of copper from leaching process. A wellperforming solventextraction circuit is a key part of producing good quality copper cathode. This wellestablished, remarkable hydrometallurgical achievement fills an important role in our technical ability to extract copper in an efficient and costeffective way. Solvent extraction is a frequently used technology in hydrometallurgy. The extraction distribution coefficient and the effects of organic and aqueous phase composition and concentration on this parameter are discussed first. Solvent extraction sx of copperii from ammonia solutions proceeds similarly to that from acidic solutions, but complexation of metal m by ammonia ligands must be considered. Solvent extraction of cu, mo, v, and u from leach solutions of copper. In this sudy extractant lix 664n has been selected based on the excellent extractive property of lix 664n for copper by solvent extraction 12. Solvent extraction, consists of transferring one or more solute s contained in a feed solution to another immiscible liquid solvent. Copper recovery using leachsolvent extraction electrowinning technology. Copper recovery using leachsolvent extractionelectrowinning. Liquidliquid extraction, mostly used in analysis, is a technique in which a solution is brought into contact with a second solvent.
Solvent extraction a separating technique distribution law. Separation of copper and nickel by solvent extraction using. The international copper study group estimates that 16% of the refined copper production from ores in 2006 used sxew. Our range of solvent extraction reagents are produced at our state of art facility. Separation of copper and nickel by solvent extraction. Pdf hydrometallurgical treatment of complex copper sulfidic ores, byproducts and concentrates requires aggressive, oxidative leaching. This video explains about technique of solvent extraction which is used to purify and recover organicinorganic products or impurities in chemical synthesis it. Both mechanistic and empirical extraction equations were developed from laboratory data for copper and ammonia. Solvent extraction techniques are used in a wide variety of industries other than hydrometallurgy and a large range of extraction equipment has been developed over the years, many types having apparent advantages over mixersettlers from the point of view of both solvent inventory and plot area. Growing role of solvent extraction in copper ores processing article pdf available in fizykochemiczne problemy mineralurgii 4242. Copper extraction refers to the methods used to obtain copper from its ores.
Extraction of copper at elevated feed concentrations. Other factors important during solvent selection are viscosity, boiling point, flammability, etc. Both metals were taken in their sulfate form and ratio of copper to nickel in feed solutions was maintained as 10. Selective separation of copper and nickel by solvent. Design of this 2ex1s configuration was based on the expected value of copper extraction efficiency of 90%.
Lix 664n concentration in kerosene was varied from 10% to 40% vv and its effect was studied on percent extraction of copper. Journal of hazardous materials b120 2005 1118 solvent extraction applied to the recovery of heavy metals from galvanic sludge j. Concentration of the copperii sulphate solution by solvent extraction. Solvent extraction of copper, nickel and zinc by cyanex 272 article pdf available in international journal of physical sciences 72012.
A wellperforming solvent extraction circuit is a key part of producing good quality copper cathode. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable. Solvent extraction and electrowining from copper leaching. Solvent extraction and separation of copper and zinc from. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. The problems related to the separation of undesirable and toxic metals are also discussed.
Extraction of copper mining, concentration, smelting. Copper solvent extraction has been adapted to deal with the leach liquors from a number of. In addition, acid consumption in the cementation process exceeds that in solvent extraction electrowinning by about 1. Basfs broad range includes aldoxime and ketoxime extractants and incorporates blends formulated to specific customer needs operational challenges. Copper leaching, solvent extraction, and electrowinning. Introduction the most important operation in hydrometallurgy is leaching of properly prepared. Solvent extraction principles and applications to process. Reagent improvements have led the way, but they have been accompanied by innovations in leaching and improvements in electrowinning. The influence of this parameter on the coextraction of copper and nickel was studied over the ph range of 7 to 9, by using equal volume of the aqueous and organic phase 10% vv lix 984n, equilibrated for 20 min at room temperature. Here the copper is extracted away from the aqueous phase leaving behind most of the impurities that were in the leach solution. Concentration of the copper ii sulphate solution by solvent extraction. Included in this report is background information regarding the kinsevere project, the principles and processes involved in solvent extraction and electrowinning for copper extraction, and the electrical connection scheme being implemented.
Copper can be extracted from nonsulphide ores by a different process involving three separate stages. It is found that the extraction of both the metals remained the same over the range of ph studied. It was found that the extraction rate of copper increases with the lix 860nic concentration. Reaction of the ore over quite a long time and on a huge scale with a dilute acid such as dilute sulphuric acid to produce a very dilute copper ii sulphate solution. Pdf growing role of solvent extraction in copper ores.
The conversion of copper consists of a series of physical and electrochemical processes. Maccabe thiele method was introduced in design of copper solvent extraction configuration when copper solvent extraction technology started to. Secondary solvent extraction circuits are often required to attain. Kordosky synopsis the concept of selectively extracting copper from a lowgrade dump leach solution followed by stripping the copper into an acid solution from which electrowon copper cathodes could. Lix 664n is a mixture of 5nonylsalicylaldoxime with a proprietary ester modifier and a. Find details about the methods and significance of this type of extraction.
Methods have evolved and vary with country depending on the ore source. Pdf solvent extraction and electrowining from copper leaching. In chile, the worlds largest copper producer, solvent extraction. Solvent extraction studies of copper and zinc have been carried out using versatic 10 acid and cyanex 272 separately from a model brass pickle liquor. Reaction of the ore over quite a long time and on a huge scale with a dilute acid such as dilute sulfuric acid to produce a very dilute copper ii sulfate solution. The extraction and purification of copper by dithizone in kerosene from an aqueous chloride.
Solvent extraction sx of copper ii from ammonia solutions proceeds similarly to that from acidic solutions, but complexation of metal m by ammonia ligands must be considered. Solvent extraction has always proved itself very helpful as a recovery method for many components. This solution, known as pregnant liquor, is recovered and then contacted with an organic solvent, referred to as the extractant, in the solvent extraction stage sx. Solvent extraction is one of the most common and important methods for separation and purification of many elements. The copper is extracted from the solvent with strong aqueous acid which then deposits pure copper onto cathodes. Extraction and purification of copper from semantic scholar. Over 10 million scientific documents at your fingertips. The method used to extract copper from its ores depends on the nature of the ore. How hydrometallurgy and the sxew process made copper the. Introduction during the last two decades the copper leaching, solvent extraction and electrowinning lxsxew process has become an important option in the production of copper from lowgrade oxidized ore. Solvent extraction a separating technique distribution. The influence of this parameter on the co extraction of copper and nickel was studied over the ph range of 7 to 9, by using equal volume of the aqueous and organic phase 10% vv lix 984n, equilibrated for 20 min at room temperature. Evaluation of copper solventextraction circuit data and. The journal of the south african institute of mining and metallurgy, 102, 445450.
This is a pdf file of an unedited manuscript that has been accepted for publication. Hydrometallurgical oxidized minerals, copper sulfide chalcocite hydrometallurgical extraction of copper leaching heap, preceded by. This proceedings documents the present status of the sxew business. Reaction of the ore over quite a long time and on a huge scale with a dilute acid such as dilute sulphuric acid to produce a very dilute copperii sulphate solution. However, techniques such as solvent extraction and precipitation have not proven cost effective in separating and recovering the cobalt from these lowgrade domestic sources.
Introduction during the last two decades the copper leaching, solventextraction and electrowinning lxsxew process has become an important option in the production of copper from lowgrade oxidized ore. Flotation tailings from copper production are deposits of copper and. Castroa a mechanical engineering department, university of minho, 4800058 guimar. Pdf solvent extraction of copperii from concentrated leach liquors. Principles of extraction this chapter focuses on three widely used techniques for extraction of semi. Even though a large number of molecules with a wide variety of extractive functionalities have been proposed as extractants to be used for the recovery of copper from sulfuric acid leach solutions, only the hydroxy oximes have been used in commercial copper sxew plants. The bureau of mines has devised a procedure using a chelating ionexchange resin to extract cobalt from a ph 3.
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