Method and plant for solvent-free microwave extraction of natural products
US7001629B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1998 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Oct 17, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/0234
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A microwave extraction method involves the steps of placing biological material in an enclosure without any solvent whatsoever and exposing the solvent-free biological material to microwave radiation to free at least some of the natural product, and then separating any residual biological material from the extracted natural product. Additionally, the microwave extraction method involves the steps of applying reduced pressure in the enclosure during the microwave radiation stage and heating the enclosure during at least most of the microwave radiation stage to compensate for the temperature drop resulting from water evaporation from the biological material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.