Patent ID: 8293333
Filing Date: 2012-10-23
Classification: B01D,B01J

Abstract:
1. A method of making an air filter, which method comprises: (a) providing an aqueous solution that contains one or more of a first water soluble copper salt and that has a pH less than 8; (b) providing an aqueous solution that contains one or more of a second water soluble salt that includes a polynuclear anion that contains molybdenum, tungsten, or a combination thereof, which aqueous solution has a pH less than 8; wherein the aqueous solution that contains the first water soluble copper salt may be the same or different from the aqueous solution that contains the second salt; and (c) contacting a substrate with the one or more of the aqueous solutions such that (1) copper and (2) molybdenum or tungsten or a combination thereof become impregnated onto the substrate.