Preparation of iso-alpha-acid-containing hop extracts
US4302479A · kind A · utility
7Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1980 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | May 27, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12C3/08
- WIPO fieldFood chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.