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US 4,289,594 AGranted
Treatment of waste compositions
AssigneeInternational Business Machines Corporation
InventorsWarren A. Alpaugh, George J. Macur, James E. Sharkness
Life of this patent
Estimating the term…
Abstract
Process for treating liquid waste compositions which contain copper ions and a complexing agent for the copper which includes reducing the concentration of copper ions in the waste solution to less than about 8 ppm and contacting the solution with an ozone-containing gas and irradiating with ultraviolet light.
Claims17
A process for treating liquid waste composition containing copper ions and an organic complexing agent for the copper ions which comprises:
- reducing the concentration of copper ions in the waste composition to less than 8 ppm;
- then contacting the waste composition with an ozone-containing gas in an amount effective to react with and destroy said organic complexing agent;
- and irradiating said waste composition with ultraviolet light.
Dependencies are inferred from the claim text.