C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/49
C02F 1/00 (2006.01) C02F 1/52 (2006.01) C02F 1/54 (2006.01)
Patent
CA 1046667
A B S T R A C T The invention relates to a novel method of clarifying aqueous waste liquids 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 arc added sequentially to said aqueous waste liquid, the amount of the additives being based on 100 ppm of the dyes.
223999
Kuwabara Kiyoaki
Nakajima Mikio
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