Method for recovering and exploiting waste of the chromic anhydr

Details Method for recovering and exploiting waste of the chromic anhydr Method for recovering and exploiting waste of the chromic anhydr

1976-07-13

1977-08-30

Wyse, Thomas G.

Liquid purification or separation

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

Responsive to fluid flow

210 56, 210 71, 210 73R, 423 55, 423595, 423607, C02B 120

Patent

active

040453405

ABSTRACT:
A process of recovering and exploiting wastes from chromic anhydride production, wherein the slurry comprising a water suspension of solid waste residue from chromic anhydride processing is subjected to a first reaction stage with sodium chromate solution at a constant flow rate and such a density as to avoid precipitation of sodium sulfate, setting pH to 2-8 by adjusting the slurry flow rate, and finally separating by filtering insoluble chromium chromate formed from the sodium bichromate and sodium sulfate solution.

REFERENCES:
patent: 3002815 (1961-10-01), Heinze
patent: 3592609 (1971-07-01), Honbo
patent: 3929978 (1975-12-01), Morero et al.

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