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US 5,853,596 AGranted
Method for reducing chemical oxygen demand of water containing organic material emulsified by a surfactant
AssigneeHenkel Corporation
InventorMichael W. Gibson
Life of this patent
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Abstract
A method for reducing the COD of water containing an emulsion of organic material in water. The emulsion contains insoluble organic material and a surfactant. The COD is reduced by mixing a cationic polymer flocculent with the water and maintaining the temperature at from 37.degree. C. to 95.degree. C. for a sufficient length of time for an organic phase and water with reduced COD to form.
Claims9
A method for reducing the COD of water contaminated with an emulsion of water-insoluble organic material and a surfactant, wherein the contaminated water comprises the effluent from a process for producing surfactants, which comprises:
- adding to the water from about 5 to about 200 parts per million by weight of a cationic polymer flocculent and maintaining the water at a temperature of from about 37.degree. C. to about 95.degree. C. to form an organic material containing phase and water with reduced COD.
Dependencies are inferred from the claim text.