Patent ID: 6296773
Filing Date: 2001-10-02
Classification: C02F,C22B,Y10S

Abstract:
A process for reducing boron content of feed water containing boron, the process comprising adjusting the pH of the feed water with an alkaline hydroxide to at least about 10.2 in the presence of silicon and a source of magnesium in a concentration of between about 10 and about 80 mg magnesium per liter of feed water, to produce treated water and a magnesium precipitate containing boron and separating the precipitate from said treated water such that the treated water contains less than about 2 mg/L boron, wherein the magnesium precipitate comprises 3MgO.Mg(OH).sub.2.6SiO.sub.2.6H.sub.2 O (sepiolite), and Mg (OH).sub.2 (magnesium hydroxide).