Method for clarifying aqueous waste liquids containing acid dyes

Details Method for clarifying aqueous waste liquids containing acid dyes Method for clarifying aqueous waste liquids containing acid dyes

1976-11-15

1978-05-09

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

210 54, C02B 120

Patent

active

040885739

ABSTRACT:
A method for clarifying an aqueous waste liquid containing acid dyes dissolved therein by bringing said waste liquid into contact with a dicyandiamide-formaldehyde resin, wherein said dicyandiamide-formaldehyde in an optimum amount as defined in the specification and at least about 300 ppm of aluminum sulfate are added sequentially to said aqueous waste liquid, the amount of the additives being based on 100 ppm of the dyes.

REFERENCES:
patent: 3066095 (1962-11-01), Hronas
patent: 3285849 (1966-11-01), Watanabe et al.
patent: 3290310 (1966-12-01), Morf et al.
patent: 3484837 (1969-12-01), Odom et al.

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