Olin Corporation

Arch Chemicals, Inc.

James D Kilby

George A Polson

Deqing Lei

Don E Reynolds

Sonia Oberson

Ellen M Meyer

George Polson

The present invention is directed to a water treatment composition, comprising: calcium hypochlorite coated with a coating comprising at least one hydrated or anhydrous salt. The present invention is also directed to a water treatment composition, comprising: (a) an inner core layer comprising calcium hypochlorite; (b) one or more interlayers of selected salts positioned on top of said inner core layer, and (c) one or more outer layers of selected salts positioned on top of said interlayer(s).

Coated calcium hypochlorite composition

A process for removing chlorate ions from an impure alkali metal chloride brine removed from an electrolytic cell comprises acidifying the impure brine to a pH of less than about 2. The acidified brine is then reacted with a reducing portion of hydrazine hydrochloride. The novel process rapidly reduces the chlorate ions in the absence of the formation of chlorine and chlorine dioxide gases and with the production of nitrogen gas as a product.

Process for removal of alkali metal chlorate from alkali metal chloride

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Cleveland, TN, United States of America

James D Kilby