Caffeine recovery from activated carbon
US5399688A · kind A · utility
2Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Jul 15, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D473/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for recovering caffeine from caffeine-loaded activated carbon and which is characterized in that the caffeine destroying activity of the activated carbon is reduced before or after loading with caffeine. The activated carbon can to that end be treated with acids, buffers, complexing agents, redox substances, caffeine and other xanthine derivatives. The caffeine recovery yield can be considerably increased by this means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.