C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/56 (2006.01) B01D 21/01 (2006.01) C02F 1/52 (2006.01)
Patent
CA 2682747
An effervescent chitosan-containing solid composition for agglomerating solids in and clarifying a slurry in a solid-liquid separation process or system, such as a mining pond, and a method of using the composition is described and claimed. The slurry contains water and solids. The composition includes chitosan, a solid acid, and a carbonate or a bicarbonate source. Optionally, the composition is formulated with an inert fluorescent tracer, to aid in dosing the composition to the slurry in the system. This clarification process causes solids to settle to the bottom of the pond, or otherwise aid in separating the solids from the aqueous phase, leaving the water less turbid than before the application of chitosan.
La présente invention concerne une composition effervescente à base de solides contenant du chitosane permettant l'agglomération de solides et la clarification d'une suspension épaisse dans un traitement ou système de séparation solide-liquide, tel qu'un bassin d'exploitation minière, ainsi qu'un procédé d'utilisation de la composition. La suspension épaisse contient de l'eau et des solides. La composition comporte du chitosane, un acide solide, et une source de carbonate ou de bicarbonate. Éventuellement, la composition est formulée avec un traceur fluorescent inerte, pour aider à le dosage de la composition dans la suspension épaisse dans le système. Ce traitement de clarification entraîne la sédimentation des solides au fond du bassin, ou en variante contribue à la séparation des solides à partir de la phase aqueuse, en laissant subsister une eau moins turbide avant l'application de chitosane.
Borden Ladner Gervais Llp
Nalco Company
LandOfFree
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