Apparatus and method for reducing residual solvent levels
US6521022B1 · kind B1 · utility
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14References
6Claims
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Assignee
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Key dates
| Filing date | Sep 5, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Sep 5, 2020 |
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.