Calcium hypochlorite/scale inhibitor/residue disperser triblend
View Patent ↗A solid calcium hypochlorite composition comprising a mixture of: solid calcium hypochlorite; a scale-inhibiting effective amount of a primarily scale-inhibiting alkali metal phosphate; and an effective residue-dispersing amount of primarily residue-dispersing alkali metal phosphate.
1. A solid calcium hypochlorite composition comprising a mixture of:
solid calcium hypochlorite;
about 0.1 to about 4.5 wt % of sodium tripolyphosphate (STPP); and
about 0.1 to about 4.5 wt % of sodium hexametaphosphate (SHMP), said weight percents being based on the total weight of said composition.
2. The solid calcium hypochlorite composition of claim 1 wherein the mixture is a homogenous mixture.
3. The solid calcium hypochlorite composition of claim 1 , wherein both STPP and SHMP are each present in an amount of from 0.2% to 1.0% by weight, based on the total weight of the composition.
4. The solid calcium hypochlorite composition of claim 3 , wherein said STPP and said SHMP are each present in an amount of 0.5% by weight, based on the total weight of the composition.
5. A solid shaped article comprising a mixture of:
solid calcium hypochlorite;
about 0.1 to about 4.5 wt % of sodium tripolyphosphate (STPP); and
about 0.1 to about 4.5 wt % of sodium hexametaphosphate (SHMP), said weight percents being based on the total weight of said composition.
6. The solid shaped article of claim 5 , wherein the three components are present in distinct layers.
7. The solid shaped article of claim 5 , wherein said mixture is a homogenous mixture.
8. The solid shaped article of claim 5 , wherein said article is in the form of a tablet.
9. The solid shaped article of claim 5 , wherein said article is in the form of granules.
10. The solid shaped article of claim 5 , wherein said article is in the form of a briquette.
11. The solid shaped article of claim 5 , wherein said article is in the form of pellets.
12. The solid shaped article of claim 5 wherein said STPP and said SHMP are each present in an amount from 0.2% to 1.0% by weight, based on the total weight of the mixture.
13. The solid shaped article of claim 12 , wherein said STPP and the SHMP are each present in an amount of 0.5% by weight, based on the total weight of the mixture.