The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2016
Filed:
Aug. 09, 2011
Salomão Solino Evelin, Belo Horizonte, BR;
Roberto Mattioli Silva, Arax, BR;
Geraldo Luiz Da Silva, Sabará, BR;
Clauson DE Souza, Belo Horizonte, BR;
Salomão Solino Evelin, Belo Horizonte, BR;
Roberto Mattioli Silva, Arax, BR;
Geraldo Luiz Da Silva, Sabará, BR;
Clauson De Souza, Belo Horizonte, BR;
VALE S.A., Rio de Janeiro, BR;
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.