Patent ID: 6139739
Filing Date: 2000-10-31
Classification: B01D,C02F

Abstract:
A compound filter cartridge for filtering fluids comprising:a) a carbon block filter element having an outer surface and an inner surface, said carbon block filter element inner surface defining a void approximately concentric with a central axis of said carbon block filter element, said carbon block filter element having sufficient permeability to permit passage of fluid from said outer surface through said inner surface of said carbon block filter element into said void and having a k-value of between about 0.01 to about 0.10;b) a selectively permeable fiber bundle positioned in said void of said carbon block filter element for receiving fluid passing through said carbon block filter element into said void, said fiber bundle comprising a plurality of hollow, microporous fibers each having a first open end and a second open end and a multiplicity of pores along the surface thereof, wherein said first and second open-ends are potted in a sealing compound body such that said first open end and said second open end of each of said hollow, microporous fibers are exposed on an outer end face of said sealing compound body permitting fluid entering said hollow, microporous fibers to exit through said outer end face of said sealing compound body; andwherein said sealing compound body is sealingly connected to said outer surface of said carbon block filter element and more than about 40% of the surface area of the selectively permeable fiber bundle is unsheathed from fluid flowing radially toward said central axis.