Process for extracting bitter flavoring principles from hops
US4160787A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1976 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Mar 31, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12C5/026
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A process is described for converting the .alpha.- and .beta.-acids of hops into the iso-.alpha. acids for use as a bitter flavoring principle ingredient for beers. The .alpha.-acids content of the hops is directly isomerized to the iso-.alpha.-acid, the bitter principle ingredient. The .beta. acids in the hops extract is transformed to the .alpha. acid either after a direct separation step before the .alpha.-acid isomerization or the residual .beta.-acids, after the isomerization, are then transformed and the resultant .alpha.-acid is isomerized. The .beta.-acid transformation results from a radiation activation followed by an oxidation step with a per - acid. The isomerization of the .alpha.-acid to the iso-.alpha.-acid is accomplished by reaction with an alkaline earth metal ethoxide preferably the magnesium ethoxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.