Dry blended filter beds

Details Dry blended filter beds Dry blended filter beds

B - Operations, Transporting

01

D

B01D 39/02 (2006.01) B01D 37/02 (2006.01) B01J 20/28 (2006.01)

Patent

CA 2177236

A method and apparatus for removing impurities from a liquid by passing the liquid through a filter bed comprising a mixture of treated filter aid material and an active particulate material. The filter bed is produced by blending a mixture of filter aid material, active particulate material and an electrolyte-type compound that produces a surface charge opposite to the normal surface charge on the filter aid material in the presence of water so that the total solids content is greater than 20 percent during the blending of the mixture.

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