Calcium hypochlorite compositions comprising zinc salts and lime
AssigneeArch Chemicals, Inc.
InventorsRichard M. Mullins, Michael J. Unhoch
Life of this patent
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Abstract
The present invention is directed to a granular water treatment composition, comprising: 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. The present invention is also directed to a water treatment tablet, comprising 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 10 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition.
Claims55
A granular water treatment composition, comprising:
- to 95 wt % calcium hypochlorite;
- 1 to 50 wt % magnesium sulfate or a hydrate thereof;
- 0.1 to 10 wt % lime;
- and
- 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof;
- all weight percents based on the total weight of said composition.
A granular water treatment composition, consisting essentially of:
- from about 50 to about 70 wt % hydrated calcium hypochlorite;
- from about 25 to about 35 wt % magnesium sulfate heptahydrate;
- from about 1.0 to about 2.0 wt % lime;
- and
- from about 10.0 to about 13.0 wt % of a zinc sulfate monohydrate;
- optionally, from about 0.01 to about 20 wt % of additional ingredients selected from the group consisting of scale inhibiting agents, residue dispersing agents, colorants, chelating agents, buffers, fragrances, algaecides, fungicides, flocculants, clarifiers, and combinations thereof,
- wherein said composition contains at least about 17 wt % of water, all weight percents based on the total weight of said composition.
A water treatment tablet, comprising:
- 35-95 wt % calcium hypochlorite;
- 1 to 50 wt % magnesium sulfate or a hydrate thereof;
- 0.1 to 10 wt % lime;
- and
- 0.1 to 10 wt % of a water soluble zinc salt or a hydrate thereof;
- all weight percents based on the total weight of said tablet.
A water treatment tablet, consisting essentially of:
- from about 60 to about 75 wt % hydrated calcium hypochlorite;
- from about 20 to about 30 wt % magnesium sulfate heptahydrate;
- from about 1.0 to about 2.0 wt % lime;
- and
- from about 1.0 to about 3.0 wt % of a zinc sulfate monohydrate;
- optionally, from about 0.01 to about 20 wt % of additional ingredients selected from the group consisting of scale inhibiting agents, residue dispersing agents, colorants, chelating agents, buffers, fragrances, algaecides, fungicides, flocculants, clarifiers, and combinations thereof,
- wherein said composition contains at least about 17 wt % of water, all weight percents based on the total weight of said composition.
A water treatment composition, comprising:
- 35 to 95 wt % calcium hypochlorite;
- 1 to 50 wt % magnesium sulfate or a hydrate thereof,
- 0.1 to 10 wt % lime;
- and
- 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof;
- all weight percents based on the total weight of said composition.
Dependencies are inferred from the claim text.