Apparatus and method for reducing residual solvent levels
US6918950B2 · kind B2 · utility
0Cited by
16References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2003 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Jan 10, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D3/343
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus and methods for reducing residual solvent levels in extracted biomass that is contaminated with HFC solvent that includes sparging the biomass extract with a solvent stripping gas such as air or nitrogen are disclosed. Apparatus for carrying out the method include a vessel (12;25) containing extract (26) and a source of the gas. The source may be in the form of a moveable, hollow wand (27) having a sparging gas outlet; or a fixed gas inlet (30) for bubbling the gas through the extract (26).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.