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  • Study of the extraction of zincII ions from ammonia

    The extraction of zincII ions with DX510A diketone from sulfate and ammoniasulfate solutions is reported. The effects of the aqueous phase pH and extracting agent concentration on the process have been investigated. The highest zincII ion recovery is observed at pH 8.59.0.

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  • Investigation of the mechanism and kinetics of

    Investigation of the mechanism and kinetics of extraction from plant m aterials . E. Simeonov. 1*, Z. Yaneva 2, C. Chilev 1 1 Department of Chemical Engineering, University of Chemical Technology and Metallurgy, 8 Kl. OhridskiInvestigation of the mechanism and kinetics of extraction from plant materials.

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  • GRAVIMETRIC DETERMINATION OF NICKEL IN AN

    GRAVIMETRIC DETERMINATION OF NICKEL IN AN UNKNOWN SOLUTION AIMThis reaction is performed in a buffered solution to keep the pH > 5 by using either an ammoniais slightly soluble to some extent in alcoholic solutions. Thus, by adding only an optimum volume

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  • Blackening of electroless nickel deposits for solar

    336 TABLE 1 Maximum equilibrium temperatures for various panels under identical conditions Sample Sample Maximum equilibrium number temperature 1 Black paint 96 2 Black chrome panel 160 a = 0.96; e = 0.12 3 Electroless black nickel 155 a=0.94;e=0.15 TABLE 2 Absorptance and emittance data before and after thermal

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  • Decisive Steps of the Hydrodefluorination of

    DFT calculations performed on conversion of trans[Nii Pr 2 Im 2 H4CF 3C 6 F 4] 5 into the two products trans[Nii Pr 2 Im 2 F3CF 32,4,5C 6 F 3 H] 9a and trans[Nii Pr 2 Im 2 F2CF 33,4,6C 6 F 3 H] 9b using the commonly accepted intramolecular concerted pathway via2C,Fbound transition states predict 9b to be the major

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  • Principal processing flowsheet of copperbrass wastes of

    The process flowsheet of dusty wastes forming during metallurgical brass production with the use of twostage leaching is proposed. The production solution, which contains the main amount of zinc ions 0.46 mol/L and a small amount of copper ions less than 0.02 mol/L is formed at the first stage

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  • Broad Family of Carbon Nanoallotropes: Classification

    Broad Family of Carbon Nanoallotropes: Classification, Chemistry, and Applications of Fullerenes, Carbon Dots, Nanotubes, Graphene, Nanodiamonds, and Combined

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  • The Principles and Applications of Ammonia Leaching of

    The combination of ammonia anal ammonium salts is known to be a powerful lixiviant used in hydrometallurgical processes. Many metals can be extracted using the mixture of ammonia/ammonium.Also presented is a comprehensive literature survey on the leaching behavior of metals in ammoniacal solutions. The metals considered in this

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  • Doklady Chemistry v.470, #1

    A sample of magnesioferrihornblendite, a potential new mineral of the amphibole supergroup, was studied by Xray diffraction and IR spectroscopy.

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  • Principal processing flowsheet of copperbrass wastes

    To recover copper from the formed solution, liquid extraction with the solution of 0.34 mol/L DX510A in kerosene is applied. Copper ions are recovered from the organic phase by reextraction with the 2.0 mol/L sulfuric acid solution.

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