Single step extraction of bitter principle and tannins from hops

US4490405A · kind A · utility

Assignee

• Horst & Klotz Hopfenveredelung GmbH · DE

Inventors

• Louis von Horst · Mainburg, DE
• Alfons Hartl

Key dates

• Filing date: Jan 20, 1982
• Grant date: Dec 25, 1984
• Expiry date: Jan 20, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/14
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

A process for extracting bitter principle and tannin from hops, uses ethanol as the extracting agent in a single extraction. By controlling the water content of the ethanol used, the quantity of extracted tannin can be controlled. The tannin component can be separated out of the obtained extract as desired. By treating the extract with water vapor, all the alcohol can be simultaneously expelled and recovered. Ethanol is preferably removed and recovered from the resultant draff by means of the flash desolventizing system (FDS) method.