Calcium hypochlorite of reduced reactivity

Abstract

The present invention describes a solid calcium hypochlorite product formulation, including a polymeric alkali salt, which formulation exhibits improved environmental stability and shelf-life while simultaneously inhibiting scale in dispensing equipment, as well as in and on feed equipment used for delivering a calcium hypochlorite solution to a water stream which is to be treated.

1 . A method for applying a polymeric alkali salt to reduce the hygroscopic and reactivity characteristics of a solid calcium hypochlorite particle comprising: 
 providing a solid calcium hypochlorite in a particle form:    applying at least one polymeric alkali salt to said solid calcium hypochlorite in an amount sufficient to reduce reactivity of said calcium hypochlorite during at least one phase of a calcium hypochlorite manufacturing process.    
     
     
         2 . The method in accordance with  claim 1 , wherein: 
 said polymeric alkali salt is applied in the form of a slurry.    
     
     
         3 . The method in accordance with  claim 1 , wherein: 
 said polymeric alkali salt is applied in the form of a solid.    
     
     
         4 . The method in accordance with  claim 1 , wherein: 
 said polymeric alkali salt is applied in the form of a foam.    
     
     
         5 . The method in accordance with  claim 1 , wherein: 
 said polymeric alkali salt is applied in the form of a liquid.    
     
     
         6 . The method in accordance with  claim 1  further including: 
 addition of a deposit controlling effective amount of an agent selected from the group consisting of at least one alkali salt of a compound selected from the group consisting of polymaleic acid, polyepoxysuccinic acid, maleic anhydride copolymer, phosphinopolycarboxylic acid, carboxylic-sulfonic acid copolymer, maleic-sulfonic acid copolymer, maleic-phosphonic acid copolymer, carboxylic-phosphonic acid copolymer, or mixtures thereof.