Patents by Inventor Geraldo Luiz Da Silva

Geraldo Luiz Da 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