Preparation of iso-alpha-acid-containing hop extracts

Details Preparation of iso-alpha-acid-containing hop extracts Preparation of iso-alpha-acid-containing hop extracts

1980-05-27

1981-11-24

Naff, David M.

Food or edible material: processes, compositions, and products

Products per se, or processes of preparing or treating...

Hop derived ingredient, including hopping of wort

426429, 426431, C12C 300, C12C 902

Patent

active

043024793

ABSTRACT:
When preparing hop extract containing iso-alpha-acids, improved yield of iso-alpha-acids is obtained by contacting a solution of extracted alpha-acids in a water-immiscible non-polar liquid with a sufficiently strong aqueous solution of acid to provide a pH of less than 1 in an aqueous phase that separates from the non-polar liquid. After contacting with the acid, the alpha-acids are isomerized such as by forming alpha acid salts and heating the salts.

REFERENCES:
patent: 3532504 (1970-10-01), Flesch
patent: 3558326 (1971-01-01), Westermann et al.
patent: 3875316 (1975-04-01), Humphrey

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