C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 11/06 (2006.01) C02F 1/50 (2006.01) C02F 1/68 (2006.01) C02F 1/76 (2006.01) C02F 5/14 (2006.01) C11D 3/395 (2006.01)
Patent
CA 2067148
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 a 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.
Une composition d'hypochlorite de calcium solide contient de l'hypochlorite de calcium hydraté et un sel de métal alcalin d'un acide polycarboxylique de phosphonobutane ayant une concentration en chlore disponible d'au moins 50 p. 100 en poids et une teneur en eau d'au moins 4 p. 100 en poids. On a découvert que l'utilisation des compositions nouvelles dévoilées peut réduire significativement l'entartrage des distributeurs d'hypochlorite de calcium, en particulier dans les endroits où l'alcalinité totale de l'eau est élevée. On réussit donc à prévenir ou à inhiber l'entartrage sans nuire aux autres propriétés de l'eau de la piscine comme le pH.
Mullins Richard M.
Wojtowicz John A.
Wood Richard B.
Arch Chemicals Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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