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US 6,746,614 B2Granted
Method for removing hydrogen peroxide from spent pickle liquor
AssigneeAK Steel Corporation
InventorsVijay N. Madi, Jerald W. Leeker
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Abstract
The present invention provides a process for the removal of hydrogen peroxide from spent pickle liquor used in a steel strip pickling process. The process utilizes an enclosed decomposition tank which includes a pickle liquor inlet pipe, an outlet pipe, at least one vent pipe, an internal baffle, and a heat source.
Claims7
A process for removal of hydrogen peroxide from spent pickle liquor used in a pickling process, comprising the steps of:
- a. flowing spent pickle liquor into an enclosed and vented tank of sufficient capacity to accommodate a quantity of solution generated by said pickling process;
- b. heating said pickle liquor to a temperature of at least about 65° C. which causes decomposition of the hydrogen peroxide into oxygen and water;
- c. maintaining said pickle liquor at said temperature in said tank for about 30 minutes to about 60 minutes;
- d. flowing said heated pickle liquor out of said tank, and removing said oxygen from said tank through a vent.
1 more element
Dependencies are inferred from the claim text.