Preparation of light stable hops

Disclosed are methods for the production of light stable hops, useful for the brewing of beer or ale to be stored in clear or green glass containers, which beer or ale will not develop objectionable flavor as a result of exposure to light. Light stable hops are prepared by double extraction of liqui...

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Hauptverfasser:	RYDER DAVID S, REFLING JAY R, GOLDSTEIN HENRY, TING PATRICK L, VANSANFORD MICHAEL, SEABROOKS JOHN R, MURAKAMI AKI A
Format:	Patent
Sprache:	eng
Schlagworte:	BEER BIOCHEMISTRY BREWING OF BEER CHEMISTRY ENZYMOLOGY METALLURGY MICROBIOLOGY MUTATION OR GENETIC ENGINEERING OTHER ALCOHOLIC BEVERAGES PREPARATION THEREOF SPIRITS VINEGAR WINE
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Beschreibung
Zusammenfassung:	Disclosed are methods for the production of light stable hops, useful for the brewing of beer or ale to be stored in clear or green glass containers, which beer or ale will not develop objectionable flavor as a result of exposure to light. Light stable hops are prepared by double extraction of liquid/supercritical CO2 extracted hop solids with ethanol to remove alpha/iso-alpha-acids. Such alpha/iso-alpha-acids may be further removed from the ethanol extraction liquor obtained in the double extraction process by subjecting such liquor to an ion exchange medium, or precipitation by a metal ion, heavy metal ion, or alkali metal ion, to provide an alpha/iso-alpha-acids free extraction liquor which may be added to the light stable hops residue obtained in the initial double extraction process.