DOP2007000110A - Proceso para el control instantáneo de precipitación de níquel y cobalto presentes en el licor permeado, mediante el ajuste del ph de la solución
- Google Patents
Proceso para el control instantáneo de precipitación de níquel y cobalto presentes en el licor permeado, mediante el ajuste del ph de la solución
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vale Do Rio Doce CofiledCriticalVale Do Rio Doce Co
Priority to DO2007000110ApriorityCriticalpatent/DOP2007000110A/es
Publication of DOP2007000110ApublicationCriticalpatent/DOP2007000110A/es
The present invention is directed to a process for the instantaneous control of precipitation of nickel and cobalt present in the leach liquor, by adjusting the pH of the solution, which process comprises the steps of adjusting the pH of a leach liquor containing nickel, cobalt and other elements dissolved in the acidic leaching process under pressure, since the balanced io concentration in solution of the elements that should be precipitated (nickel and cobalt) varies as a function of the pH, so that said adjustment takes place after the leach liquor solution is subjected to at least a previous step of selective precipitation of aluminum, ferric iron, ferrous iron, chromium, among others, by adjusting the pH through the use of a suitable reagent such as lime and/or limestone; by carrying out a second adjustment of the pH an instantaneous precipitation control of nickel and cobalt is accomplished, and as a consequence the nickel and cobalt will precipitate from said leach liquor; such precipitated material separated from the low nickel and cobalt solution will be used in refineries for the recovery of such elements later on.
DO2007000110A2007-06-212007-06-21Proceso para el control instantáneo de precipitación de níquel y cobalto presentes en el licor permeado, mediante el ajuste del ph de la solución
DOP2007000110A
(es)
Proceso para remoción y estabilización de arsénico y metales pesados desde ácidos residuales con alto contenido de arsénico que comprende contactar el efluente a tratar con acido sulfhídrico y precipitar sulfuros de arsénico insolubles a ph menor de 2; y sistema para la remoción y estabilización de arsénico desde efluentes industriales ácidos, principalmente líquidos provenientes del lavado de gases de fundición de metales no ferrosos.
Proceso para el control instantaneo de la precipitacion de niquel y cobalto presentes en el licor de lixiviacion por medio del ajuste del ph de la solucion
Proceso de purificacion directo desde un efluente de lixiviacion de laterita de niquel que comprende ajuste del ph de una solucion de lixiviacion entre 1 y 3, adsorcion selectiva del niquel y cobre sobre el hierro ferrico o ferroso mediante una resina de intercambio ionico, y la recuperacion de niquel.