Showing papers in "Hydrometallurgy in 1978"

TL;DR: In this article, the galvanic interaction between pyrite and chalcopyrite was investigated in the presence of bacteria and was found to accelerate the corrosion of chal copyrite.

TL;DR: In this article, the characteristics of the Levextrel resins have been described as having a macroporous structure and containing phosphoric acid esters, and they have been tested for metal refining.

TL;DR: In this paper, the authors showed that when polytetrafluoroethylene or polypropylene membranes were placed between aqueous solutions of copper(II) sulfate at pH 1-4 and of sulfuric acid at pH 0.5, transfer of copper (II) ion from the less acidic to the more acidic solution took place simultaneously with an equivalent proton transfer in the opposite direction.

TL;DR: In this paper, the results of a kinetic study of the sulphuric acid leaching of nickel and magnesium from the reduction roasted serpentine component of a typical laterite were presented.

TL;DR: The literature on the extraction of metals with carboxylic acids and mixtures with other extractants since 1970 is reviewed in this article, where both extraction chemistry and the applications are discussed.

TL;DR: Nickel extraction from ammoniacal media, containing, initially, 0.03 mol dm−3 of nickel, by 10% v/v Shell metal extractant 529 in MSB 210 or Shellsol A, has been studied as a function of pH, counter anions (nitrate or sulphate), ammonium salt concentration, temperature (10 to 50°C), and the presence of copper, cobalt and zinc.

TL;DR: In this article, the structural characteristics of copper deposits resulting from copper cementation on pure aluminum are presented and the effect of chloride ion concentration, rotational speed of the aluminum disc, hydrogen ion concentration and temperature on the nature and morphology of the deposits is investigated.

TL;DR: In this paper, correlation equations for the cementation of cadmium on zinc, of copper on zinc and of copper/cadmium precipitation systems were developed for the three different systems when the reaction is carried out under an inert atmosphere using a rotating disc geometry under laminar flow conditions.

TL;DR: In this paper, high-grade nickel-copper matte is treated at Impala Platinum to produce nickel briquettes and copper cathodes, the major portion of the nickel values are preferentially extracted in a first stage acid oxidation leach.

TL;DR: In this paper, a process has been proposed for separation and recovery of lithium chloride from leach solutions at the laboratory scale, which has been successfully applied for production of lithium chloride.

TL;DR: In this article, the metal and reagent species in kerosene type diluents were investigated for several aromatic o-hydroxyoximes LIX ∗ 65 N, LIX∗ 70, Shell Metal Extractant 529 (SME529), Acorga P17 and Acorgas P50 Association of at least three molecules has been observed, no evidence was found for discrete reagent dimers Spectroscopic evidence confirmed that the extracted nickel reagent complex was a 1:2 metal:reagent species.

TL;DR: In this article, the effect of chloride ion additions from various sources, viz. KCl, NaCl, AlCl 3 · 6H 2 O), CuCl 2 · 2H 2O), and HCl, on the rates of copper cementation on aluminum has been studied.

TL;DR: In this article, the extraction of copper and zinc from sulphate media by di-2-ethylhexylphosphoric acid (D2EHPA) is reported, and the data for the binary metal system zinc/copper extracted by 20 v/v % EHPA are reported.

TL;DR: The acute toxicity of twelve solvent extraction chemicals was studied in the albino rat after intraperitoneal injection of the chemicals, and in the rainbow trout (Salmo gairdnerii Rich.) after exposure to the chemicals in the aquaria water as mentioned in this paper.

TL;DR: In this paper, the influence of the concentration of copper(II)-ammine-sulphate complexes, temperature and concentration of ammonia on the velocity of the leaching of copper metal in sulphate solutions was investigated by application of the rotating disc method.

TL;DR: The solvent extraction of zirconium and hafnium from nitric acid solutions into dibutyl butylphosphonate (DBBP)/Solvesso 150 has been studied, as a function of acidity, DBBP and metal concentration as mentioned in this paper.

TL;DR: In this article, the reaction of hydrogen sulphide bubbles with cadmium chloride dissolved in water was studied and the experimental values of mass transfer coefficients were found to be higher than those predicted by theory.

TL;DR: In this paper, the acid regeneration of pyritic sulphide concentrates has been studied and a flow-sheet for the treatment of sulphidic resources of nickel and copper has been proposed.

TL;DR: The research and development effort in the field of solvent extraction of non-ferrous metals for the period from late 1974 to the end of 1976 has been reviewed in this paper, where the review is broken down into sections for individual metals, secondary metals and wastes, acid extraction processes and two special sections on manganese nodules and platinum group metals.

TL;DR: In this paper, the influence of the groupement alkyle de divers acides dialkyldithophosphoriques (RO) 2 P(S)SH on the conditions d'extraction du nickel in a milieu acide sulfurique is investigated.

TL;DR: In this article, the interaction between alkaline solutions of the sodium salts of ethylenediaminetetraacetic acid (E.D.T.) and nickel-bearing laterites has been studied at temperatures between 25°C and 90°C.

TL;DR: The metal sulfide-sulfur dioxide reaction has been characterized for seven different sulfide ores by using the changes in sulfur dioxide pressure during the reaction and by ultraviolet spectrophotometric analysis of the reaction products as mentioned in this paper.

TL;DR: In this article, the effectiveness of ferric chloride leaching of nickel sulphide concentrates and of a nickel sulfide matte has been demonstrated, and the reaction was followed by continuous measurements of pH, conductivity, redox potential and spectrophotometric intermittent measurements concerning nickel concentrations.