C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/58 (2006.01) C02F 1/42 (2006.01) C02F 1/52 (2006.01)
Patent
CA 2755868
A process for treating a natural or wastewater containing dissolved Mg or dissolved Al comprising the steps of adding at least one Mg-containing compound or at least one Al-containing compound to the natural or wastewater to thereby form a layered double hydroxide (LDH) containing Mg and Al as a predominant metal species in a lattice of the LDH. The LDH may contain hydrotalcite. The Al-containing compound may be aluminate or aluminium hydroxide derived from the Bayer process or from an alumina refinery.
La présente invention concerne un procédé de traitement des eaux naturelles ou usées contenant du Mg dissous ou de l'Al dissous comprenant l'étape consistant à ajouter au moins un composé contenant du Mg ou au moins un composé contenant de l'Al aux eaux naturelles ou usées afin de former ainsi un hydroxyde double lamellaire (LDH) contenant du Mg et de l'Al comme espèces métalliques prédominantes dans un réseau du LDH. Le LDH peut contenir de l'hydrotalcite. Le composé contenant de l'Al peut être de l'aluminate ou un hydroxyde d'aluminium dérivé du procédé Bayer ou d'une raffinerie d'alumine.
Commonwealth Scientific And Industrial Research Organisation
Sim & Mcburney
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