Phosphoric Acid → Zinc Phosphate

HRID 1706353Notes

Reaction equation

HRID 1706353 reaction equation
[O-2].[Zn+2:2].[Zn].[Br-].[K+].[P:6](=[O:10])([OH:9])([OH:8])[OH:7]>O>[P:6]([O-:10])([O-:9])([O-:8])=[O:7].[Zn+2:2].[P:6]([O-:10])([O-:9])([O-:8])=[O:7].[Zn+2:2].[Zn+2:2]

Participants

6

Reactant 4

HCID 1004Phosphoric Acid2×HCID 23994ZincHCID 253877Potassium BromideHCID 3007857Zinc Oxide

Product 1

HCID 24519Zinc PhosphateYield 121.4%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

Zinc-containing wastes resulting from the production of 2,2-hydroxy-5-methylphenylbenzotriazole in the amount of 725 g containing 625 g of zinc oxide and 65 g of metallic zinc are ground in a ball mill by the wet grinding method in the presence of 700 g of water, whereafter an additional 1,500 g of water and 86 g of potassium bromide are added to the ground mixture. Under continuous stirring the suspension is heated to a temperature of 80° C. and 687 g of phosphoric acid are added as calculated for 100% H3PO4. After 30 minutes the suspension is filtered, the residue is washed and dried to give 1.2 kg of zinc phosphate (the yield is 95%).

Workup

  1. additionare added
  2. filtrationAfter 30 minutes the suspension is filtered
  3. washthe residue is washed
  4. customdried

Sources & evidence

ORD record
ord-38362c1f25f0435b8e58dd245c6b5c1e
Source dataset
uspto-grants-1980_06
Patent number
US04207301

Reaction notes

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