Dimeric aluminum compounds and their use

Details Dimeric aluminum compounds and their use Dimeric aluminum compounds and their use

C - Chemistry, Metallurgy

02

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C02F 5/06 (2006.01) C01F 7/48 (2006.01) C01F 7/56 (2006.01) C01F 7/64 (2006.01) C02F 1/52 (2006.01)

Patent

CA 1262381

ABSTRACT A method of clarifying waters having an alkalinity of at least 100 ppm, calculated as CaCO3, which comprises: a. Adding thereto, to form a treated water, an effective amount for the purpose of clarifying said waters of a low-basicity polynuclear aluminum species having the formula: Aln(OH)mZ3n-m wherein, n is at least 1.0 Z is a halide chosen from the group chloride, bromide, iodide, and mixtures thereof, and wherein the ratio of m/n ranges between about 0.25 to about 1.0 and at least 25 mole percent of the polynuclear aluminum species above has n equal to 2.0, and then, b. Allowing sufficient time to form and build a floc dispersed in the treated water, which floc contains turbidity causing components, and then, c. Phase separating the floc from the treated waters to obtain clarified water.

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