Process for removal of undissolved impurities from ion exchange resin
AssigneeEcodyne Corporation
InventorsGeorge Flynn, Eli Salem
Life of this patent
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Abstract
A process for scrubbing undissolved impurities from the upper portion of an ion exchange resin filtration bed is disclosed wherein air is introduced in the upper portion of the bed and develops a pressure within the vessel. This pressure subsequently forces rinse water down through the upper portion of the bed and out of the vessel. The gas is introduced into the bed and the water is drained therefrom at a level below the bed's upper surface but above a substantial lower portion of the resin bed. In this manner, lesser quantities of scrubbing fluids are required and the majority of the resin material is left undisturbed to maintain maximum ion exchange capacity.
Claims7
A process for cleaning particulate impurities from a bed of ion exchange resins contained in a filtration vessel, comprising:
- adjusting the level of liquid within said vessel to a point intermediate the top of said vessel and the upper surface of said bed to provide a freeboard area within said vessel;
- introducing a gas into said vessel at a level below the upper surface of said resin bed but above a substantial lower portion thereof, thereby scrubbing said particulate impurities from the resin above said gas introduction level and suspending said impurities in said liquid;
- collecting said gas in said freeboard area of said vessel and terminating said gas introudction upon reaching a predetermined pressure within said vessel;
- and
- draining a portion of said liquid containing said suspended mpurities from said vessel at a level generally equal to said gas introduction level.
Dependencies are inferred from the claim text.