Patent ID: 6174445
Filing Date: 2001-01-16
Classification: C01B,C01F,C01G,C01P,C02F,Y10S

Abstract:
A method for treatment of water for removal of suspended solids therefrom, comprising adding to the water an effective amount of a polynucleate hydroxide ionic compound of the formula:M.sub.a N.sub.b (OH).sub.c X.sub.d Y.sub.e Z.sub.f.(H.sub.2 O).sub.gwhereinM is a tri- or more valent metal ion;N is a divalent metal ion that forms a soluble salt with anions X, Y or Z;OH represents the level of basicity;X is a monovalent anion;Y is a divalent anion;Z is a trivalent anion;a is 1;b is from 0.44 to 2.0;c is from 0.3 to 5;d is from 0 to 3;e is from 0.1 to 2.25f is from 0 to 1; andg is greater than 4 where the compound is in the form of an aqueous solution, or from 0 to 20 where the compound is not in the form of an aqueous solution and wherein the mole ratio of N to M is greater than 0.44 and the polynucleate metal hydroxide ionic compound coagulates, flocculates or precipitates the suspended solids from the water for removal of the coagulated, flocculated or suspended solids.