Process for the extraction of volatile compounds with supercritical carbon dioxide, and compounds obtained
US5073267A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Jan 12, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23L27/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In this process a percolation of supercritical gas through the starting material is conducted, the carbon dioxide loading with extractable compounds, then, when the percolation pressure reaches a predetermined value, the percolation medium is let down, feeding the latter into a separation zone in which the volatile compounds are trapped in the solid carbon dioxide formed, these compounds being recovered in aqueous solution after sublimation of CO.sub.2. According to the invention, the extraction is conducted, in the separation zone, in the presence of a trapping medium suitable for retaining the volatile compounds, advantageously a medium which has very low solubility in liquid or supercritical CO.sub.2 and is capable of dissolving the volatile compounds (glycerol or edible oil) or of complexing these (cyclodextrins). The starting material chosen has a lipid content which is not excessively high (especially fruits and derived products). The trapping medium having retained the volatile compounds and the latter, after separation from the said medium, are used as aroma substances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.