Graver Chemical

Graver Chemical Company

Joseph M Ragosta

Bruce L Libutti

A filter bed for removing impurities from a liquid stream is described. The filter bed comprises a mat of pliant fibers and relatively stiff fibers. The filter bed may additionally include adsorbent particles. The filter bed can provide desirable filtration efficiencies while exhibiting relatively low operating differentials. A method for separating impurities from a liquid which employs the filter bed is also described.

Adsorbent filter bed with pliant and stiff members and method for

Adsorbent filter bed with pliant and stiff members

The present invention provides a filter element that comprises a center core and at least one layer of ion exchange yarn wound about the center core. In a preferred embodiment, more than one winding layer is wound about the core. The present invention also provides a method for purifying liquids, the method comprising providing a filter unit that contains a filter element that comprises a center core and at least one layer of ion exchange yarn wound about the core, and passing a liquid to be purified through the filter element.

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Elkton, MD, United States of America

Joseph M Ragosta