Method for purifying waste waters which contain anionic-type org

Details Method for purifying waste waters which contain anionic-type org Method for purifying waste waters which contain anionic-type org

1976-02-03

1976-12-28

Wyse, Thomas G.

Liquid purification or separation

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

Responsive to fluid flow

8 81, C02B 120, C02C 502

Patent

active

040000699

ABSTRACT:
In waste-water-treatment, the improvement consisting in causing the precipitation of anionic pollutants by adding to the sewage an aqueous solution of a bis-triarylphosphonium salt. A number of different chemical formulas for such salts are disclosed. It becomes possible to recover dyestuffs from dyeing baths in the textile industries, while solving a severe pollution-preventing problem.

REFERENCES:
patent: 3303220 (1967-02-01), Matthews et al.
patent: 3389081 (1968-06-01), Eckenfelder et al.
patent: 3531514 (1970-09-01), Redmore
patent: 3875111 (1975-04-01), Tsuda et al.

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