Method and apparatus for recovering a solvent
US7485207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2003 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Sep 8, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11B9/025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A closed-loop biomass extraction apparatus using HFC solvents including an extraction vessel, an evaporator for the solvent, a compressor and a condenser connected in series in a closed loop extraction circuit; a solvent recovery loop constituted by a bypass line; a plurality of flow control valves that are selectively operable for connecting the solvent recovery loop in parallel with the closed loop extraction circuit; and at least one container containing an adsorbent for organic contaminants and a desiccant, the container being connected in the solvent recovery loop to which solvent in the extraction circuit may be supplied through selective operation of the flow control valves whereby solvent used in the extraction circuit may be supplied through the adsorbent and the desiccant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.