Caffeine recovery from supercritical carbon dioxide
US4996317A · kind A · utility
11Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1988 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Aug 5, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process and apparatus for caffeine recovery from supercritical carbon dioxide is disclosed. The process involves countercurrent extraction of caffeine from supercritical carbon dioxide with water at pressures in excess of 1,000 p.s.i. in an unpacked extraction column. The apparatus includes an unpacked extraction vessel having a distributor therein for distributing water throughout substantially the entire cross-sectional area of the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.