Abstract: This application describes a composition comprising an alkali metal permanganate and a water soluble nitrate salt and a method of controlling the sulfide content and the odor of sulfur containing waste water by adding the composition of the invention to the waste water.

Abstract: This application describes a composition comprising an alkali metal permanganate and a water soluble nitrate salt and a method of controlling the sulfide content and the odor of sulfur containing waste water by adding the composition of the invention to the waste water.

Abstract: A process and apparatus for producing an aqueous solution of chlorine dioxide and chlorine wherein the likelihood of autodecomposition of chlorine dioxide is significantly reduced or practically eliminated and, in the unlikely event that such CLO.sub.2 autodecomposition occurs, it is quickly detected and the process is automatically corrected.

Abstract: A process for the production of an aqueous solution containing chlorine dioxide and chlorine, which comprises:(a) feeding to a reaction zone a first reactant stream comprising an aqueous solution containing an alkali metal chlorate and an alkali metal chloride;(b) feeding to said reaction zone a second reaction stream comprising an acid admixture of phosphoric acid and sulfuric acid, wherein the weight ratio of said phosphoric acid to said sulfuric acid as expressed as H.sub.3 PO.sub.4 :H.sub.2 SO.sub.4, is from about 1:16 to about 1:3;(c) mixing said first and second reactant streams in said reactant zone; said streams being fed into said reaction zone at rates sufficient to form a reaction product stream comprising an aqueous solution of chlorine dioxide and chlorine in said reaction zone; and(d) withdrawing the resulting aqueous reaction product stream from said reaction zone.