Methods for making tetrahydroisoalpha and hexahydroisoalpha acids
US5013571A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1990 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Jan 31, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12C9/025
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A method of converting alpha acids to hop flavors by exposing the alpha acids to an environment capable of substantially simultaneously isomerizing and reducing the alpha acids to form either THIAA or HHIAA. Another aspect of this invention is directed to a method of reducing hop flavors by exposing an isoalpha acid, a dihydroisoalpha acid or a mixture thereof to conditions suitable to reduce said acids to produce THIAA, HHIAA or a mixture thereof at a pH of about 5 to about 12 in a reaction inert, protic solvent. Yet another aspect of this invention is directed to a method of reducing hop flavors comprising exposing an isoalpha acid, a dihydroisoalpha acid or a mixture thereof to conditions suitable to reduce said acids to produce THIAA, HHIAA or a mixture thereof in a reaction inert, aprotic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.