Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkali metal
Reexamination Certificate
2005-10-18
2010-12-28
Bos, Steven (Department: 1793)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkali metal
C423S186000, C423S193000, C423S202000, C423S420000, C423S421000, C423S499400, C423S499500, C423S545000, C210S639000, C210S698000, C210S701000, C023S30200R, C023S303000, C023S30200R, C023S30200R
Reexamination Certificate
active
07858058
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.
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Bargeman Gerrald
Demmer René Lodewijk Maria
Kuzmanovic Boris
Mayer Mateo Jozef Jacques
Schutyser Maarten André Irène
Akzo Nobel N.V.
Bos Steven
Kenyon & Kenyon LLP
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