Phosphorus recovery from phosphorus-containing pond sludge

Details Phosphorus recovery from phosphorus-containing pond sludge Phosphorus recovery from phosphorus-containing pond sludge

1986-10-29

1988-01-05

Hruskoci, Peter

Chemistry of inorganic compounds

Phosphorus or compound thereof

Elemental phosphorus

210710, 210737, 210772, 210906, B01D 1200

Patent

active

047175583

ABSTRACT:
A process is described for recovering phosphorus from pond sludge found in ponds located near phosphorus plants. An aqueous solution of the sludge, which has a phosphorus concentration in the range of 5% to 70% by weight, is heated at a temperature in the range of 165.degree. F. to 212.degree. F., preferably for about 1/2 hour to about 6 hours, washed with water at an elevated temperature, and then reheated. A phosphorus layer having an enhanced concentration of recoverable elemental phosphorus is formed as a result of this process.

REFERENCES:
patent: 4399037 (1983-08-01), Diskowski et al.
patent: 4462973 (1984-07-01), Crea et al.
patent: 4492627 (1985-01-01), Crea

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