Patents by Inventor Roberto Mattioli Silva

Roberto Mattioli Silva has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for treating liquid effluents and recovering metals
    Patent number: 9410223
    Abstract: A method for treating liquid effluents and recovering metals is described, which comprises the steps of: a) liquid effluent equalization; b) sulphide addition and precipitation of metals in the form of metal sulphides; c) solid/liquid separation of the metal sulphides produced in step (b) and formation of a metal-free liquid phase; d) addition of a 50 to 250 g/L amine solution to the liquid phase precipitating magnesium in the form of magnesium hydroxide (Mg(OH)2); and e) recovery of amine by stripping and rectification.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: August 9, 2016
    Assignee: VALE S.A.
    Inventors: Salomão Solino Evelin, Roberto Mattioli Silva, Geraldo Luiz Da Silva, Clauson De Souza
  • METHOD FOR TREATING LIQUID EFFLUENTS AND RECOVERING METALS
    Publication number: 20130343972
    Abstract: A method for treating liquid effluents and recovering metals is described, which comprises the steps of: a) liquid effluent equalization; b) sulphide addition and precipitation of metals in the form of metal sulphides; c) solid/liquid separation of the metal sulphides produced in step (b) and formation of a metal-free liquid phase; d) addition of a 50 to 250 g/L amine solution to the liquid phase precipitating magnesium in the form of magnesium hydroxide (Mg(OH)2); and e) recovery of amine by stripping and rectification.
    Type: Application
    Filed: August 9, 2011
    Publication date: December 26, 2013
    Applicant: VALE S.A.
    Inventors: Salomão Solino Evelin, Roberto Mattioli Silva, Geraldo Luiz Da Silva, Clauson De Souza
  • Liquid and solid effluent treatment process
    Patent number: 8043585
    Abstract: A process for recovering metals such as Ni, Co, Mn, Cu, Zn, among others, through precipitation as sulphides, enabling recovery of magnesium in the form of hydroxide, carbonate and oxide and providing recovery of sulphate as gypsum and ammonium sulphate. Liquid phase, after full treatment, comprises recovered water with a quality proper for total reuse in industrial process. This process of liquid and solid effluent treatment is provided with flexibility to process several types of effluents presenting wide variations in their chemical composition.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: October 25, 2011
    Assignee: Vale Inco Limited
    Inventors: Salomao Solino Evelin, Roberto Mattioli Silva
  • LIQUID AND SOLID EFFLUENT TREATMENT PROCESS
    Publication number: 20090180945
    Abstract: A process for recovering metals such as Ni, Co, Mn, Cu, Zn, among others, through precipitation as sulphides, enabling recovery of magnesium in the form of hydroxide, carbonate and oxide and providing recovery of sulphate as gypsum and ammonium sulphate. Liquid phase, after full treatment, comprises recovered water with a quality proper for total reuse in industrial process. This process of liquid and solid effluent treatment is provided with flexibility to process several types of effluents presenting wide variations in their chemical composition.
    Type: Application
    Filed: January 9, 2009
    Publication date: July 16, 2009
    Applicant: VALE INCO LIMITED
    Inventors: Salomao Solino Evelin, Roberto Mattioli Silva