Method for removing essential oils and antioxidants from extract products of lamiaceae species using rolled film evaporation
US6450935B1 · kind B1 · utility
6Cited by
13References
15Claims
0Family size
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Inventor
Key dates
| Filing date | Oct 13, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Apr 16, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/0296
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An increase in specific antioxidant activity of extracts from rosemary (Rosemarinus officinalis) is obtained by the use of a blend of tetrafluoroethane and an organic solvent in the extraction process. A blend of tetrafluoroethane, acetone and methanol improves total yield. A tetrafluoroethane and acetone blend has higher efficacy but comparatively lower yields. The methods yield a liquid and oily antioxidant extract that is readily mixed with a liquid product such as soybean oil for addition to animal feeds and human food. The methods simultaneously yield pharmaceutical-grade essential oils in high yields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.