Method for simultaneous extraction of essential oils and antioxidants from Labiatae species and the extract products thereof
US6855349B2 · kind B2 · utility
2Cited by
13References
9Claims
0Family size
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Key dates
| Filing date | Dec 7, 1998 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Feb 2, 2019 |
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 acetone 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.