Process for decreasing elemental phosphorus levels in an aqueous

Details Process for decreasing elemental phosphorus levels in an aqueous Process for decreasing elemental phosphorus levels in an aqueous

1979-12-10

1981-08-18

Wyse, Thomas G.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210906, C02F 154

Patent

active

042845157

ABSTRACT:
A process is provided for decreasing elemental phosphorus levels in an aqueous medium containing elemental phosphorus. Preferably, the elemental phosphorus levels are at about 10 ppm or less. The process comprises adding to the aqueous medium an effective amount of caustic, preferably Ca(OH).sub.2, the effective amount being an amount sufficient to increase the pH of the aqueous medium to at least about 11, to produce a basic aqueous medium. The basic aqueous medium is then clarified and neutralized.

REFERENCES:
patent: 3971707 (1976-06-01), Deshponde
patent: 4228003 (1980-10-01), Makino
Van Wazer, Phosphorous and Its Compounds, vol. II, pp. 1204-1205 (1961).
"Waste Control in a Fragile Environment", Envir. Sci. & Tech., vol. 6, p. 980 (1972).
Ackerman et al., "Direct Determination, etc.", Proc. Chem. Inst. of Canada, Polln. Conf., Halifax, Aug., 1969, pp. 140-147.
"Coexistence of a Fishery, etc.", Proc. Chem. Inst. of Canada, Polln. Conf., Halifax, Aug., 1969, pp. 5-15.

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