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A systematic study for the separation of zinc from solutions containing zinc manganese iron cadmium and magnesium as sulfates was developed after a batch countercurrent extraction followed by scrubbing and stripping In the first step batch Jan 02 2012 sulphate solution by selective extraction of copper by LIX 984 followed by extraction of cobalt and zinc with D2EHPA Separation of copper and zinc from Hudson Bay mining and smelting discharge was studied by Owusu 11 using LIX 622 He observed that upto 9798 Cu was extracted with negligible coextraction of Zn Fe Cd and Co A process
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Nov 01 2021 Purification of concentrated manganese sulfate solution by solvent extraction is discussed in this paper The use of bis 2ethylhexyl hydrogen phosphate D2EHPA and bis 244trimethylpentylphosphinic acid BTMPPA was studied in removal of impurities from zinc electrowinning anode sludge leachates Over 99 of zinc and iron were removed by both kerosene The author concluded that the separation of manganese from cobalt and nickel by D2EHPA in kerosene was affected by temperature and pH At pH 30 better separation of manganese from cobalt and nickel was achieved at room temperature 23 C Meanwhile at pH 35 better separation of manganese from cobalt was achieved Cheng et al
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two metals of the zinc manganese and cobalt are listed in Table 1 32 Separation of zinc from manganese Fig 1 shows that Cyanex 272 or Cyanex 302 to D2EHPA increases the pH05 of zinc and manganese One can attribute the selectivity of zinc and manganese to the differences between the pH05 values of the two metals Hence the data The extraction and separation of divalent zinc and manganese from a sulphate solution was carried out using sodium salts of D2EHPA PC88A and
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Electric arc furnace dust EAFD of ferromanganese production units in the form of slurry contains tar alkalies manganese zinc iron silica calcium aluminum and other elements A hydrometallurgical route based on solvent extraction technique was investigated for selective separation of manganese from the dust Leaching of the EAFD resulted in an aqueous feed The application of D2EHPA in zinc solvent extraction has extensive background To utilize more effectively response surface methodology was used to optimize the concentration condition of zinc pregnant solution ZPL extracted by D2EHPA In the current research zinc iron and manganese extraction along with separation factor of zinciron Sf ZnFe and zinc
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32 Selective extraction of zinc Completely neutralized 004M Na D2EHPA was used to recover zinc values from the binary solution containing 0995kgm3 of zinc 095kgm3 of cobalt and 01M Na 2SO4 The equilibrium isotherm F igure 6 for the extraction of zinc was obtained by equilibrating the aqueous and organic phases in the phase ratios This paper compares the efficiency of D2EHPA and Cyanex 272 to extract the divalent manganese cation from an actual leaching solution obtained by reductive leaching of a lowgrade pyrolusite ore using SO2 gas The studied variables were the extractant concentration in the organic phase the pH of the leached liquor and the volume ratio between organic phase and
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Apr 01 2015 Ahmadipour et al 2011 investigated the effect of D2EHPA on the separation of zinc and manganese In this study the ZnMn value decreased from 176 to 10 within equilibrium pH of 25 to 50 Similar result has been reported by Nathsarma and Devi 2006 These results show that the higher values of separation factor can be obtained at lower pHs The liquidliquid extraction of ZincII using D2EHPA as extractant has been investigated in order to recover zincII sulphate from an industrial effluent produced by Votorantim Co which contains several metallic species such as cadmium cobalt iron
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Jan 15 2021 The PLS containing 3507 gL zinc 316 gL iron and 458 gL manganese impurities was produced for the selective separation of zinc with 93 of zinc from sulphate leaching solution of a Although D2EHPA is still widely used in basemetal SX its applications are now more typically found in primary extraction of zinc 30 or removal of manganese 31 as an impurity element Organophosphonic and phosphinicacid extractants offer much better selectivity for cobalt extraction over nickel albeit under higher
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The extraction and separation of divalent zinc and manganese from a sulphate solution was carried out using sodium salts of D2EHPA PC88A and Cyanex 272 in kerosene This paper describes a route for recovering manganese and zinc from spent zincMnO 2 dry cells via acid leaching using sulfuric or hydrochloric acids as leachants Hydrogen peroxide was added as reductant Experiments were run at 2540 C for 13 h Under the best optimal conditions over 975 wt of zinc and manganese were leached by both acids
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manganese separation more than a single extractant 6 17 and 18 Adding Cyanex 302 to D2EHPA caused a synergistic effect and shifted the extraction curve of zinc to lower pHs and manganese to higher pHs thus separation of manganese from zinc improved 6 17 The extraction of iron I i r on a d z c w th m x u es f seen from Table 1 the filter cake is mostly composed of zinc and manganese Table 1 Chemical analysis of the Co purification filtercake Content wt Co Mn Zn Ni Cd Ca 119 91 1466 007 035 664 Separation between manganese and cobalt was examined encompassing four
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Nov 01 2012 The paper is focused on the use of solvent extraction for purification of leach liquor solutions obtained by leaching of NiMH spent batteries dissolved nickel is separated from manganese and zinc by liquidliquid extraction using D2EHPA Two extractants were investigated D2EHPA and Cyanex 272 in ndodecane and the preliminary tests suggested In this work zinc extraction from an industrial leach solution was investigated by saponified di2ethylhexylphosphoric acid D2EHPA The solution obtained was from a bioleaching process of a lowgrade leadzinc sulfide ore that contained 50 gL of zinc and 63 gL of iron The selective and high ZnII extraction yield were obtained by modification of D2EHPA in a proposed two
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In this study the extraction of zinc and iron by Lix984N and D2EHPA from ions sulfate synthesized electrolyte contained 1468 gl of zinc and 130 gl of iron was investigated The removal of zinc from a concentrated nickel stream at Rustenburg Base Metal Refiners in South Africa was successfully implementedafter extensive test ing6 During the upfront laboratory test programme the Purolite MTS9500 AMP resin was directly compared with the Lewatit OC1026 D2EHPAimpregnated resin
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in zinc solvent extraction especially in the sulfate media D2EHPA acts well at pH values between 1 and 3 for zinc extraction from solution D2EHPA in the sulfate environment does not have a good function for zinc separation compared to manganese 2226 For separation of zinc from cadmium as an impurity the results also indicated separation of cobaltII and zincII was studied from a sulphate solution using NaD2EHPA NaPC88A and NaCyanex 271 of 004M concentration 16 The liquidliquid extraction of zincII using D2EHPA as extractant has been investigated in order to recover Liquid Liquid Extraction of ZincII From Acid Media
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