Olin Corporation

Richard B Wood

Richard M Mullins

John A Wojtowicz

Christopher M Zetena

Carl V Schatz

An improved chemical feeder employing periodic partial immersion in a forced circulation system is provided having a soluble chemical hopper, and a dissolving chamber into which the soluble chemical chamber extends an adjustable distance and a discharge chamber in fluid flow communication with the dissolving chamber to selectively receive chemically treated water from the dissolving chamber and discharge it into a flow loop connected to the forced circulation system. A visual indicator ring is preferably present to show the height of the hopper. The adjustable hopper allows an expanded range of chemical feed rates for the feeder.

Dual range periodic chemical dispenser for swimming pools

A solid calcium hypochlorite composition contains calcium hypochlorite and an alkali metal salt of phosphonobutane polycarboxylic acid having an available chlorine concentration of at least 50 percent by weight. It has been found that the use of the novel compositions of the present invention can significantly reduce scale formation in dispensers for calcium hypochlorite particularly where water having high total alkalinity is used. The prevention or inhibition of scale formation is accomplished without harmfully affecting other properties of the pool water such as the pH.

Calcium hypochlorite compositions containing phosphonobutane

A solid calcium hypochlorite composition contains hydrated calcium hypochlorite and an alkali metal salt of phosphonobutane polycarboxylic acid having an available chlorine concentration of at least 50 percent by weight and a water content of at least 4 percent by weight. It has been found that the use of the novel compositions of the present invention can significantly reduce scale formation in dispensers for calcium hypochlorite particularly where water having high total alkalinity is used. The prevention or inhibition of scale formation is accomplished without harmfully affecting other properties of the pool water such as the pH.

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Bristol, CT, United States of America

Richard B Wood