Abstract: Safety-calcium hypochlorite composition containing 16% by weight to about 22% by weight of water and at least an amount of calcium hypochlorite corresponding to 60% by weight of active chlorine content on a dry basis on the composition, wherein active chlorine content is a number of percentage of twice the weight of chlorine of calcium hypochlorite divided by weight of a mixture.

Abstract: A continuous cyclic process for production of calcium hypochlorite wherein an aqueous solution saturated with calcium hypochlorite and sodium chloride is chlorinated by using chlorine gas to produce sodium chloride crystals and an aqueous chlorinated reaction mixture, the formed sodium chloride crystals being then separated from said aqueous chlorinated reaction mixture. First sodium hydroxide is added to the foregoing aqueous solution which solution also contains calcium hypochlorite and sodium chloride in the crystal phase. Then calcium hydroxide and sodium hydroxide is further added to the aqueous chlorinated reaction mixture remaining after separation of said crystals therefrom. This mixture containing calcium hydroxide and sodium hydroxide is again chlorinated with chlorine gas to produce a slurry containing mainly sodium chloride crystals, calcium hypochlorite crystals and a mother liquor saturated with calcium hypochlorite and sodium chloride.