Patent ID: 6929759
Filing Date: 2005-08-16
Classification: C02F

Abstract:
1. A composition of matter comprising an aqueous solution containing the following dissolved components: a) at least one polyaluminum compound selected from the group consisting of polyaluminum chloride, polyaluminum sulfate, polyaluminum sulfate chloride, polyaluminum sulfate silicate, polyaluminum ferrisulfate, polyaluminum ferrisulfate chloride, and polyaluminum ferrisulfate, the amount of polyaluminum compound corresponding to 6.6 to 10 weight parts aluminum; b) 0.1 to 7 weight parts magnesium, calcium, or magnesium and in the form of a compound that forms a neutral or acid anion; and c) 0.3 to 10 weight parts of one or more organic, water-soluble polymeric flocculants selected from the group consisting of the polyamines, polydiallyldimethylammonium chloride (polyDADMAC), polyethylenimine acetates, and polyethylenimines, where the weight parts are based on 100 weight parts of the composition, and wherein the composition contains 2.0 to 20 parts magnesium and 3.0 to 60 weight parts polymeric flocculants based on 100 weight parts aluminum, and has a pH range of 0.3 to 4.