Preparation of hop extracts rich in particular constituents

Details Preparation of hop extracts rich in particular constituents Preparation of hop extracts rich in particular constituents

C - Chemistry, Metallurgy

07

C

260/588.5

C07C 49/743 (2006.01) C12C 3/10 (2006.01)

Patent

CA 1133515

ABSTRACT PREPARATION OF HOP EXTRACTS RICH IN PARTICULAR CONSTITUENTS Hop extract containing a high proportion of a desired constituent, hop oil, .alpha.-acids or .beta.-acids, is formed by extracting hops with pressurized fluid carbon dioxide, collecting separate fractions of the extract obtained at different times, and selecting the fraction having a high proportion of the desired constituent. Fractions containing a) at least 70% of the available hop oil at at least 10% concentration, and b) at least 25% of the available .alpha.-acids at at least 55% concentra- tion, may be obtained in a single process by extracting initially at a lower temperature in the range 0°C to 57 C and subsequently at a higher temperature in the range -5°C to 31°C.

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