Method of making a granular media water filter

Details Method of making a granular media water filter Method of making a granular media water filter

2008-01-18

2010-06-22

Kim, John (Department: 1797)

Liquid purification or separation

Filter

Material

C055S524000, C156S283000, C210S502100, C210S503000, C210S504000, C264S122000, C264S128000, C264SDIG048

Reexamination Certificate

active

07740141

ABSTRACT:
Granules comprise binder-agglomerated active particles for liquid treatment or filtration. Each granule has a center core of a material that itself has binding properties without the addition of other binders or sprays or adhesives, or, alternatively, each granule comprises a matrix of active materials stuck together with the binder. The binder structure preferably ranges from a non-uniform matrix of binder formed by heat-deformed binder particles, to a clump of binder particles generally retaining the original shape or the binder particles, to non-continuous connectors of binder between active particles. The invented two-part media has high surface area per volume of media, which, because the outer surface and inner void surfaces of the particles are preferably substantially covered with active particles, translates to high activity for the preferred treatment process. Therefore, while a mixture of active particles may be used and a mixture of binders may be use, each media granule preferably consists only of a matrix, clump, or plurality of connectors of binder coated with active particles, with preferably no support for the active component other than the binder material.

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