Apparatus for the extraction of constituents by a supercritical fluid or pressurized liquid
US4824570A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Apr 2, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/0203
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for the extraction of constituents present in a substance by means of an extraction fluid constituted by a supercritical fluid or a pressurized liquid. According to this apparatus, in an exterior (3) contacting takes place between the substance and the extraction fluid in order to dissolve the constituents in fluid. The fluid leaving the extractor is then treated to separate the extracted constituents. The fluid is expanded at a pressure p.sub.1. Firstly, the less volatile constituents are separated in a liquid-gas separator (41), the separated gas is then liquefied in gas separator-liquefier (13) and the thus liquefied gas is rectified in column (19) to concentrate the extracted constituents in the liquid phase. The extraction fluid can be carbon dioxide gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.