Patent ID: 6099814
Filing Date: 2000-08-08
Classification: C02F

Abstract:
Method for the wet treatment of effluents containing a compound selected from the group consisting of H.sub.2 SO.sub.4, free SO.sub.2, SO.sub.3.sup.-, or SO.sub.4.sup.= and having a pH lower than 5, in which these effluents are reacted with particles selected from the group consisting of CaCO.sub.3.MgCO.sub.3, MgCO.sub.3, and mixtures thereof, to neutralize said effluents and form magnesium sufate, the said particles having a particle size such that at least 95% of the particles selected from the group consisting of CaCO.sub.3.MgCO.sub.3, MgCO.sub.3 and mixtures thereof have a particle size smaller than 75 .mu.m and larger than 3 .mu.m, and recovering said magnesium sulfate in the form of a solution or brine from said effluents.