Dewatering process
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United States of America Patent
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Jul 6, 2010
Grant Date -
Aug 16, 2007
app pub date -
Feb 28, 2005
filing date -
Mar 12, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A process of dewatering an aqueous suspension employing a flocculating system comprising treating the suspension with a flocculating amount of a first flocculant and a dewatering amount of a second flocculant, and subjecting the suspension to mechanical dewatering to form a cake, wherein the first flocculant brings about flocculation and assists thickening of the suspension and the second flocculant further dewaters the suspension, characterized in that the second flocculant is a water-soluble or water swellable polymer that is mixed into the suspension in the form of aqueous composition comprising dissolved or hydrated polymer having a Brookfield viscosity of above 30,000 cps (measured at 20° C.).
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