Extraction of phytochemicals
US7943190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2005 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Apr 29, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23L33/105
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A processing system and methods for extracting phytochemicals from plant materials with subcritical water. The processing system includes a water supply interconnected with a high-pressure pump, diverter valve, a temperature-controllable extraction vessel, a cooler, a pressure-relief valve and a collection apparatus for collecting eluant fractions from the extraction vessel. The processing system controllably varies the temperature of subcritical water within the extraction vessel, and may optionally be configured to controllably vary the pH of subcritical water flowing into the extraction vessel. A plant material is placed into the extraction vessel after which a flow of subcritical water is provided through the extraction vessel for extraction of phytochemicals. The temperature of subcritical water is controllably varied during its flow through the extraction vessel water thereby producing a plurality of eluant subfractions corresponding to the temperature changes, thereby separating the different classes of phytochemicals extracted from the plant material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.