Hydrogen Peroxide → Zinc Phosphate

Participants

Reaction Steps

Zinc-containing wastes resulting from the production of sodium formaldehydesulphoxylate (rongalite) in the amount of 440 g containing 405 g of zinc oxide and 21 g of metallic zinc are ground in a ball mill by the wet grinding method in the presence of 500 g of water, whereafter additional 1,000 g of water are added thereto along with a 30% aqueous solution of hydrogen peroxide in the amount of 71 g. Under continuous stirring the suspension is heated to a temperature of 70° C., whereafter 342 g of phosphoric acid as calculated for 100% H3PO4 are added thereto. After 30 minutes the suspension is filtered, the residue is washed and dried. There are obtained 700 g of zinc phosphate (the yield is equal to 98%).

Provenance & Evidence