AN ALUMINA BLOCK FILTER MEDIA

摘要

The present invention relates to an activated alumina block filter media and a process for preparation of the alumina block, for use in gravity fed water filters and pressurized water filters for efficiently filtering particulate contaminants including microorganisms like cysts, bacteria and virus apart from removal of chemical contaminants while at the same time providing for relatively high flow rates. The alumina block filter media for use in gravity fed water filters and pressurized water filters comprises (a) activated alumina having a particle size in the range of 100 to 1000 microns and with a BET surface area in the range 200 to 1000 m2/g and (b) a binder material having a Melt Flow Rate (MFR) of less than 5 wherein the ratio of activated alumina particles to the binder is in the range of 1:1 to 20:1 by weight.