Hydrogenation of hop soft resins using CO.sub.2
US6020019A · kind A · utility
46Cited by
13References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 26, 1996 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Mar 26, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12C3/10
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
Carbon dioxide is used as a reaction solvent in the hydrogenation of organic compounds. The carbon dioxide is preferably a liquid or a supercritical fluid. The hydrogenation method can be used advantageously in methods for making tetrahydroiso-alpha-acids from alpha-acids, iso-alpha-acids, or beta-acids. If beta-acids are used to make tetrahydroiso-alpha-acids, an acidic lower alcohol is preferably added to the carbon dioxide reaction medium to act as a promoter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.