Patent ID: 8163668

Claim:
An inorganic electrolyte setting agent capable of rendering heavy metal ions nonhazardous, comprising: an aqueous solution as a main agent mixed with A, B, C, E, and F below, (A) sulfuric acid, (B) at least one of aluminum sulfate and polyaluminum sulfate, (C) at least one of polyferric sulfate and ferric chloride, (E) ferric sulfate, (F) at least one of magnesium chloride and magnesium sulfate; and an aqueous solution as a concomitant agent mixed with D, G and H below, (D) at least one of potassium silicate and sodium silicate, (G) at least one of barium ferrite magnet, sodium aluminate and sodium hexametaphosphate., (H) sodium polyacrylate, wherein a mixing ratio by weight in the main agent is such that water is 100 to 250, the above A is 2 to 5, the above B is 250 to 600, the above C is 80 to 250, the above E is 10 to 50 and the above F is 5 to 10; and a mixing ratio by weight in the concomitant agent is such that water is 100 to 300, the above D is 500 to 1000, the above G is 50 to 150 and the above H is 2 to 5.