Patent ID: 9005687
Filing Date: 2015-04-14
Classification: B01D,B01J,C12H

Abstract:
1. A method for reducing the amount of beverage soluble metal ions in a diatomaceous earth filter aid, the method comprising: contacting the diatomaceous earth filter aid with a hop compound selected from iso-alpha-acids, dihydroiso-alpha-acids, tetrahydroiso-alpha-acids, hexahydroiso-alpha-acids, alpha-acids, and beta-acids, wherein the beverage soluble metal ions are selected from copper, iron and mixtures thereof, and wherein the diatomaceous earth filter aid is dispersed in a slurry, and the hop compound is added to the slurry at 0.1 to 20 percent by weight of the diatomaceous earth in the slurry, whereby the beverage soluble metal ions are confined on a matrix of the diatomaceous earth filter aid.