WO WO2005094966A1
The invention concerns carbon block filter media for use in gravity fed filters comprising powder activated carbon (PAC) having a particle size distribution such that 95 wt% of the particles pass through 50 mesh and not more than 13 % passes through 200 mesh, and a binder material having a Melt Flow Rate (MFR) of less than 5 g/10 min. The invention also provides water filters and a process for the preparation of a carbon block filter medium. The invention finally provides a process for the purification of water whereby the water under the influence of gravity is passed first through a washable or replaceable sediment filter for removing fine dust and other particulates above 3 µm and thereafter through a carbon block filter medium comprising PAC and binder material.
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