Treatment of aqueous solutions
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United States of America Patent
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Jun 21, 2016
Grant Date -
Dec 25, 2014
app pub date -
Oct 4, 2012
filing date -
Oct 4, 2011
priority date (Note) -
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Abstract
The invention is directed to a process for the recovery or removal of one or more crystallizable compounds from an aqueous solution containing, apart from the said crystallizable compounds, one or more organic or inorganic scale-forming or scale-inducing materials having a lower solubility in water than the said crystallizable compounds, said process comprising subjecting the said solution to at least one eutectic freeze crystallization step with recovery of ice and said one or more crystallizable compounds in crystalline form, recycling at least part of the mother liquor formed in the said eutectic crystallization step and subjecting the said recycle to a treatment with seed crystals for said scale forming or scale inducing compounds, removing at least part of the solid material obtained in said treatment step and recycle of the aqueous liquid thus obtained to the eutectic freeze crystallization step or to the feed thereto.
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