Process for the production of isohumulones

US4758445A · kind A · utility

Assignee

• Hopstabil Hopfenverarbeitungs-Gesellschaft mbH · DE

Inventor

• Paul Klusters · Brackenheim, DE

Key dates

• Filing date: Mar 27, 1986
• Grant date: Jul 19, 1988
• Expiry date: Mar 27, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C12C9/025
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of isohumulones from a hop extract is described in which the hop extract is mixed in a ratio of 1:2 to 1:50 with aqueous solution by stirring at elevated temperature to obtain a two-phase system, the aqueous phase is separated and the humulones are precipitated therefrom by addition of an alkaline earth metal salt; thereafter isomerization of the alkaline earth humulates to the corresponding alkaline earth isohumulates and if necessary conversion of the later to the free isohumulones is carried out. The free isohumulones thus obtained are used to impart a bitter flavor to beer or worts.