Abstract: A substantially dry filtering media for rejuvenating glyceride oils is formed by admixing a calcined metallic oxide and an expanded silicate in a tumbler having grounded, electrically conducting walls for a period of time to electrostatically produce an agglomerate. Specific examples of metallic oxides are calcined magnesium oxide, calcined aluminum oxide, calcined potassium oxide, calcined calcium oxide, calcined zinc oxide and calcined ferric oxide. Examples of the silicate are expanded perlite and expanded pumice. The agglomerate so formed is of sufficient size to facilitate filtering of the oil, and subsequent removal of the media from the rejuvenated oil.
Abstract: A filtering media for use with edible liquids consisting of 80 percent synthetic amorphous silica, 10 percent synthetic amorphous magnesium silicate, 9 percent diatomaceous earth, and 1 percent synthetic amorphous silica-alumina. The process of rejuvenating spent cooking oil by admixing the filtering media in the spent cooking oil, maintaining the mixture at a temperature of 275.degree. F. for a period of about five minutes, and filtering the mixture to remove particulate matter including the filtering media.