Precipitation of iron related color bodies
AssigneeChemed Corporation
InventorStewart N. Paul
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Abstract
Clarification of iron waste waters using basic dyes such as methylene blue, methyl violet or malachite green and the like, alone or in combination with organic or inorganic additives.
Claims8
The method of clarifying iron waste waters containing red iron-containing particles suspended therein comprising adding thereto an effective amount of a dye selected from the group consisting of basic blue and green dyes, thereby to flocculate the particles, and recovering a clarified correspondingly blue or green tinted water.
The method of clarifying iron waste waters containing red iron-containing particles suspended therein in an amount of about 80-145 ppm, comprising adding thereto an effective amount of a dye selected from the group consisting of methylene blue and malachite green, thereby to flocculate the particles, and recovering a clarified correspondingly blue or green tinted water.
Dependencies are inferred from the claim text.