Methods for reducing soluble metal ions in diatomaceous earth filter aids
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United States of America Patent
Stats
-
Apr 14, 2015
Grant Date -
Sep 15, 2011
app pub date -
Mar 15, 2010
filing date -
Mar 15, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
First Claim
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International Classification(s)
- 2010 Application Filing Year
- C12C Class
- 29 Applications Filed
- 18 Patents Issued To-Date
- 62.07 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C12C Class
- 0 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 14, 2026 |
