Browsing by Author "Casas de Prada, Jesús"

Now showing items 1-8 of 8

    • Bioleaching Model of a Copper-Sulfide Ore Bed in Heap and Dump Configurations 
      Casas de Prada, Jesús; Martínez, J.; Moreno, L.; Vargas Valero, Tomás (1998-08)
      A two-dimensional (2-D) model for a heap or dump bioleaching of a copper ore containing mainly chalcocite and pyrite has been developed. The rate of the mineral sulfide dissolution was related to the rate of oxidation ...
    • Cristalización extractiva de perrenato de sodio en forma sustentable 
      Sepúlveda Epple, Elizabeth Haydee (Universidad de Chile, 2011)
      El objetivo de este trabajo fue plantear una alternativa al proceso industrial existente, utilizando la cristalización extractiva como respuesta, proceso en el cual -gracias a la disminución de la solubilidad de la sal ...
    • Crystallization of sodium perrhenate from NaReO4–H2O–C2H5OH solutions at 298 K 
      Casas de Prada, Jesús; Sepúlveda, Elizabeth; Bravo, Loreto; Cifuentes, Luis (Elsevier, 2012)
      Crystallization of sodium perrhenate (NaReO4) from aqueous solution was studied by means of laboratory scale experiments at 298 K. NaReO4 has a very high solubility in aqueous solution (>1130 g/L at 298 K) so crystallization ...
    • "Desarrollo de un proceso de cristalización sustentable de molibdato de sodio" 
      Lagos Caris, Josué Aliro (Universidad de Chile, 2009)
      El molibdeno es un metal de alto punto de ebullición (2610'C), Io que le otorga propiedades de dureza (5,5 en escala Mohs) y resistencia a la corrosión. En Chile el molibdeno se obtiene principalmente como subproducto ...
    • Processing of a ferric anolyte produced by a copper electrowinning cell based on reactive electro dialysis 
      Casas de Prada, Jesús; Acuña Goycolea, P.; Crisóstomo, G.; Cifuentes, L. (PERGAMON-ELSEVIER, 2008-06)
      The processing of a Fe-containing anolyte produced by a copper electro winning process carried out in a reactive electro dialysis (RED) cell has been studied. The resulting anolyte was an acidic aqueous solution which ...
    • Speciation of the Fe(II)-Fe(III)-H2SO4-H2O system at 25 and 50 degrees C 
      Casas de Prada, Jesús; Crisóstomo, G.; Cifuentes, L. (ELSEVIER SCIENCE BV, 2005-12-30)
      This work presents theoretical and experimental results on the speciation of the Fe(Il)-Fe(III)-H2SO4-H2O system in concentrated solutions (up to 2.2 m H2SO4 and 1.3 m Fe). The aim was to study the chemical equilibria of ...
    • Two-dimensional dynamic model of a copper sulphide ore bed 
      Sidborn, M.; Casas de Prada, Jesús; Martínez, J.; Moreno, L. (ELSEVIER, 2003-10)
      A two-dimensional dynamic model for bioleaching of secondary copper minerals from a pile has been developed. In the model. aeration of the pile is considered to be due to natural convection caused by the density gradient ...
    • The use of electrohydrolysis for the recovery of sulphuric acid from copper-containing solutions 
      Cifuentes, L.; García, I.; Ortiz, R.; Casas de Prada, Jesús (ELSEVIER, 2006-06-15)
      Two lab-scale electrohydrolysis (EH) cells have been used to study the effectiveness of this method in the recovery of sulphuric acid from copper-containing electrolytes such as those present in copper electrorefining. ...