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US 6,827,854 B2Granted
Filters and filter materials for the removal of microorganisms and processes for using the same
AssigneeThe Procter & Gamble Company
InventorsMichael Donovan Mitchell, Blair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
Life of this patent
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Abstract
Filters and filter materials for removing microorganisms from a fluid are provided along with processes for using the same. The filters include a housing having an inlet and an outlet and a filter material disposed within the housing, wherein the filter material is formed at least in part from a plurality of filter particles having an activated coating with a lignosulfonate.
Claims26
A filter comprising:
- a) a housing having an inlet and an outlet;
- and
- b) a filter material for removing microorganisms from water, said filter material disposed within said housing, said filter material formed at least in part from a plurality of filter particles comprising a carbonized and activated lignosulfonate coating, wherein the sum of mesopore and macropore volumes of one or more of said carbonized and activated ligosulfonate coated filter particles is between about 0.2 mL/g and about 2.2 mL/g.
A filter comprising:
- a) a housing having an inlet and an outlet;
- and
- b) a filter material for removing microorganisms from water, said filter material disposed within said housing, said filter material formed at least in part from a pluratlity of filter particles comprising a carbonized and activated lignosulfonate coating, wherein the carbon add-on in said carbonized and activated lignosulfonate coating is less than about 85% and wherein the BRI of said filter particles is greater than 99%, and wherein the sum of mesopore and macropore volumes of one or more of said carbonized and activated lignosulfonate coated filter particles is between about 0.2 mL/g and about 2.2 mL/g.
A filter comprising:
- a) a housing having an inlet and an outlet;
- and
- b) a filter material for removing microorganisms from a fluid, said filter material disposed within said housing, said filter material formed at least in part from a plurality of filter particles comprising a carbonized and activated lignosulfonate coating, wherein the carbon add-on in said carbonized and activated lignosulfonate coating is less than 85%, and wherein the BRI of said filter particles is greater than 99.9%, and the VRI of said filter particles is greater than about 95%, and wherein the sum of mesopore and macropore volumes of one or more of said carbonized and activated lignosulfonate coated filter particles is between about 0.2 mL/g and about 2.2 mL/g.
Dependencies are inferred from the claim text.