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:
Dec. 28, 2010
Filed:
Oct. 18, 2005
Gerrald Bargeman, Wageningen, NL;
René Lodewijk Maria Demmer, Enter, NL;
Boris Kuzmanovic, Arnhem, NL;
Cornelis Elizabeth Johannus Van Lare, Wijchen, NL;
Mateo Jozef Jacques Mayer, Amersfoort, NL;
Maarten André Irène Schutyser, Wageningen, NL;
Jan Barend Westerink, Lochem, NL;
Gerrald Bargeman, Wageningen, NL;
René Lodewijk Maria Demmer, Enter, NL;
Boris Kuzmanovic, Arnhem, NL;
Cornelis Elizabeth Johannus Van Lare, Wijchen, NL;
Mateo Jozef Jacques Mayer, Amersfoort, NL;
Maarten André Irène Schutyser, Wageningen, NL;
Jan Barend Westerink, Lochem, NL;
Akzo Nobel N.V., Arnhem, NL;
Abstract
The invention pertains to removing soluble alkali metal or ammonium salt of a divalent anion from brine comprising following steps: obtaining brine with NaCl-concentration between 150g/L and saturation in the presence or absense of a cyrstal growth inhibitor for NaCl(GCI-NaCl),or with NaCl concentration above saturation in the presence of a CGI-NaCl, said brine optionally comprising a crystal growth inhibitor for the alkali metal or ammonium salt of the divalent anion(CGI-DA); if necessary, acidify the solution to pH<11.5; if the concentration of CGI-DA is less than 20 mg/L, adding CGI-DA to obtain at least 20 mg CGI-DA/L; subjecting the solution to a membrane filtration; if the concentration of CGI-DA in the concentration from the separation is less than 20 mg/L, adding CGI-DA to obtain at least 20 mg CGI-DA/L; crystalling the concentration; removing the crystallized alkali metal or ammonium salt of the divalent anion.