Ultrapurification of organic solvents
US6059857A · kind A · utility
14Cited by
33References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/229
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for the ultrapurification of organic solvents comprising (1) a membrane-based vapor permeation step for selective removal of water vapor from the solvent, wherein a countercurrent sweep stream is used that has a particular partial pressure of water vapor, (2) a filtration step for selective removal of particulates, and (3) an ion exchange step for selective removal of ionic species.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.