Patent ID: 7258887

Claim:
A method for the preparation of a light stable hop product, the method comprising: mixing hop solids with a first alcohol solvent to form a mixture of the hop solids and the first alcohol solvent, the hop solids being residue obtained by extracting hops with carbon dioxide; separating the mixture of the hop solids and the first alcohol solvent into treated hop solids and a first filtrate including alpha/iso-alpha acids; mixing the treated hop solids with a second alcohol solvent to form a mixture of the treated hop solids and the second alcohol solvent; separating the mixture of the treated hop solids and the second alcohol solvent into hop solids residues and a second filtrate including alpha/iso-alpha acids; and precipitating said alpha/iso-alpha-acids in said first filtrate or said second filtrate by addition of a compound, selected from the group consisting of calcium carbonate, calcium hydroxide, magnesium hydroxide, magnesium carbonate, magnesium acetate, zinc sulfate, and zinc acetate, to said first filtrate or to said second filtrate, removing precipitated alpha/iso-alpha-acids from said first filtrate or from said second filtrate to form a purified filtrate and a light stable hop product comprising the hop solids residues containing no alpha/iso-alpha acids, blending the purified filtrate with the light stable hop product, and evaporating off aqueous alcohol from the light stable hop product.