Method of reducing off-flavor in a beverage using silane-treated silica filter media
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United States of America Patent
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Aug 2, 2011
Grant Date -
Sep 17, 2009
app pub date -
Dec 1, 2005
filing date -
Dec 16, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a method for preventing or reducing off-flavor in a beverage. Silane-treated silica filter media are synthesized. By contacting the beverage with the silane-treated silica filter, one or more off-flavor substances or off-flavor precursors bind to the silane-treated silica filter media and are removed. Beverages that tend to develop off-flavor upon storage such as alcoholic, fruit, and vegetable beverages, are suitable for the present invention. The present invention provides a method that can reduce the level of off-flavor substances such as trans-2-nonenal, diacetyl, and cis-3-nonenal. The present invention also provides a method that can reduce the level of off-flavor precursors such as linoleic acid. The silica filter media useful for the present method include rice hull ash, oat hull ash, or diatomaceous earth.
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