Methods for reducing soluble metal ions in diatomaceous earth filter aids

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United States of America Patent

PATENT NO 9005687
APP PUB NO 20110223301A1
SERIAL NO

12724173

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Abstract

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A method for reducing the amount of beverage soluble metal ions in a diatomaceous earth filter aid is disclosed. The beverage soluble metal ions can be copper and/or iron. In the method, the diatomaceous earth filter aid is contacted with a hop compound selected from iso-alpha-acids, dihydroiso-alpha-acids, tetrahydroiso-alpha-acids, hexahydroiso-alpha-acids, alpha-acids, and beta-acids. The diatomaceous earth filter aid can also be contacted with and an acid other than the hop compound such as phosphoric acid. The iso-alpha-acids, dihydroiso-alpha-acids, tetrahydroiso-alpha-acids, hexahydroiso-alpha-acids, alpha-acids, or beta-acids bind the copper and iron metal ions and/or change the form of copper and iron in diatomaceous earth so the copper and iron are rendered substantially insoluble in a beverage such as beer. A method for filtering a beverage using the treated diatomaceous earth filter aid is also disclosed. A method for increasing the flavor stability of a malt beverage filtered with a diatomaceous earth filter aid is also disclosed.

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Patent Owner(s)

  • MILLERCOORS LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Casey, Gregory P Littleton, US 1 1
Dannenberg, Rhonda M Port Washington, US 1 1
Eplett,, III John T Wauwatosa, US 1 1
Laumann, Jacqueline A Wales, US 1 1
Ryder, David S Mequon, US 30 143
Saunders, Fran L Whitefish Bay, US 1 1
Ting, Patrick L Brookfield, US 22 310

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