摘要:
The present invention is an extracted hop powder which has one or more hop acids blended back. This hop acid powder is flowable, does not cake-up and is more stable than hop powder that has not been extracted.
摘要:
The invention relates to a process for the production of iso-alpha-acids starting from hop alpha-acids in which an hop alpha-acid containing feed is contacted with a heterogeneous alkaline earth metal based catalyst, that essentially does not dissolve in the alpha-acid containing feed or in the iso-alpha-acid product phase, either in solvent-free conditions or in the presence of water, carbon dioxide, or an organic solvent or a mixture thereof. The resulting mixture is subjected to a temperature of at least 293 K, preferably under an inert atmosphere, for a time sufficient to effect high conversion of the alpha-acid reactant into the iso-alpha-acid product. The molar ratio of alpha-acid to earth alkaline metal (Mg, Ca, Sr, Ba) varies preferably between 0.2 and 20. After the isomerization process, the heterogeneous alkaline earth metal based catalyst can be quantitatively separated from the iso-alpha-acid product phase by liquid-solid separation techniques.
摘要:
Disclosed are methods for the production of light stable hop products, 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 hop products 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 filtrate obtained in the double extraction process by subjecting such filtrate to an ion exchange medium, or precipitation by a metal ion, heavy metal ion, or alkali metal ion, or hydrogenation to provide an alpha/iso-alpha-acids free filtrate which may be added to the light stable double extracted hop solid residues obtained in the initial double extraction process.
摘要:
An improved flavoring composition and process for brewing malt beverages is disclosed. In one embodiment of the invention, the flavoring composition is formed from a high solids percent, room temperature stable, partially aqueous composition of a potassium salt of iso-α-acids. Such composition may be added to the w ort kettle or else used as a post-fermentation additive, preferably after dilution with demineralized water. In another embodiment, the flavoring composition comprises a mixture containing reduced (rho-) iso-α-acids in alkali metal salts form, β-acids and hop oil. This latter composition is useful as a substitute for normal kettle extract, hops or hop pellets, allowing easy preparation of beer that resists formation of unpleasant, 'skunky' flavors but has otherwise similar flavor and physical properties.
摘要:
Unsaturated organic compounds, in particular α-acids and β-acids, are purified prior to hydrogenation by mixing them with an adsorbent capable of adsorbing catalyst poisons, preferably activated carbon, and separating the adsorbent containing the catalyst poisons to recover the thus purified unsaturated organic compounds. A significant reduction in the use of hydrogenation catalyst is realized.
摘要:
The present invention is an extracted hop powder which has one or more hop acids blended back. This hop acid powder is flowable, does not cake-up and is more stable than hop powder that has not been extracted.
摘要:
This invention discloses a method for producing of hop aroma from hop oil that uses only carbon dioxide and ethanol as solvents. It also covers ‘green’ aromas produced by that method and the beers produced using these ‘green’ aromas.
摘要:
Eine Druckbehälteranordnung umfasst einen äußeren Druckbehälter (1) und mindestens einen Einsatzkorb (3) im Druckbehälter (1) zur Aufnahme eines zu behandelnden Gutes, das mit einem in den Druckbehälter (1) und Einsatzkorb (3) einbringbaren Druckfluid beaufschlagbar ist. Es ist eine Kontrolleinrichtung (11, 20) für den im Einsatzkorb (3) herrschenden Innendruck insbesondere in Form einer den Innenraum (9) des Einsatzkorbes (3) mit der Umgebung (12) über den Druckbehälter (1) hinweg verbindenden, schaltbaren Druckausgleichsleitung (11) vorgesehen.