Recovery of calcium hypochlorite values from filter media employed in the filtration of Ca(OCl){hd 2 {b slurries

摘要

A process is described for recovering calcium hypochlorite values from the filter media employed in the filtration of calcium hypochlorite slurries. Deposits of Ca(OCl)2 along with insoluble materials adhering to the filter media are washed with an aqueous solution of calcium hypochlorite to form a slurry of calcium hypochlorite solids. Water is used to wash the filter media to dissolve any remaining Ca(OCl)2 and form a solution of calcium hypochlorite. The slurry and solution are then admixed to provide a solution of calcium hypochlorite whose concentration is controlled within the range of from about 45 to about 215 grams per liter of Ca(OCl)2. This solution is employed in the production of calcium hypochlorite and is recycled to the washing step.