Process for treating an acidic waste water stream

Details Process for treating an acidic waste water stream Process for treating an acidic waste water stream

1975-07-17

1977-07-12

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 53, 210 56, 210 67, C02B 120

Patent

active

040352935

ABSTRACT:
Disclosed is a process for purifying an effluent containing acids such as phosphonic and phosphoric acids by the addition of CaO or Ca(OH).sub.2 in an amount ranging from 55-93 per cent by weight basis acids at a temperature of 35.degree. to 100.degree. C to a pH of 8 to 12. After removing the precipitated material, the effluent can be neutralized with CO.sub.2 gas. The precipitate can be calcined to tri calcium phosphate.

REFERENCES:
patent: 3099622 (1963-07-01), Woerther
patent: 3345288 (1967-10-01), Sontheimer
patent: 3623975 (1971-11-01), Cardinal et al.
patent: 3650686 (1972-03-01), Hudson et al.
patent: 3697233 (1972-10-01), Peck
patent: 3725265 (1973-04-01), Legal
patent: 3763041 (1973-10-01), Cook et al.
patent: 3796790 (1974-03-01), Sirianni et al.

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