TH80313A - Filtration media and preparation processes - Google Patents

Abstract

DC60 (17/03/49) This invention concerns a water filtration process involving the passage of water through a filtration bed containing a pre-hydrolyzed, multivalent positively charged metal adsorbed onto a solid substrate. The ratio of OH groups to metal is between 0.5 and 3. The multivalent metals include aluminum, iron, zinc, calcium, or magnesium. This invention also concerns a filtration medium consisting of a solid substrate treated with an aqueous solution of a pre-hydrolyzed, multivalent positively charged metal and the addition of a biocide. This invention concerns a water filtration process involving the passage of water through a filtration bed containing 1–20 percent by weight of a solid substrate adsorbed with a pre-hydrolyzed, multivalent positively charged metal. Where the ratio of OH to metal is between 0.5 and 3, and the multivalent metals include aluminum, iron, zinc, calcium, or magnesium, this invention also concerns a filtration medium consisting of passing a solid substrate through a treated aqueous solution of a hydrolyzed positively charged metal with added biocide.

Claims (1)

DC60 (17/03/49) This invention concerns a water filtration process involving the passage of water through a filtration bed containing hydrolyzed multivalent metals adsorbed onto a solid substrate. The ratio of OH groups to metal is between 0.5 and 3. The multivalent metals include aluminum, iron, zinc, calcium, or magnesium. This invention also concerns a filtration medium consisting of a solid substrate treated with an aqueous solution of hydrolyzed multivalent metals and the addition of a biocide. This invention concerns a water filtration process involving the passage of water through a filtration bed containing 1-20 percent by weight of a solid substrate adsorbed with hydrolyzed multivalent metals. Where such metals have an OH-to-metal ratio between 0.5 and 3, and the multivalent metals include aluminum, iron, zinc, calcium, or magnesium. This invention also concerns a filtration medium consisting of passing a solid substrate through a treated aqueous solution of a hydrolyzed positively charged multivalent metal with added biocide. Claim (First), which appears on the advertisement page: 1. A water filtration process consisting of passing water through a filtration bed containing a solid substrate adsorbed onto it by 1-20 percent (by weight) of a pre-hydrolyzed positively charged multivalent metal, predominantly aluminum, where the OH-to-metal ratio is between .5 and 3, and where a 1 percent (weight/volume) aqueous solution of the substance is present.