Recovery of aprotic polar solvents from their saline aqueous solutions
US5458751A · kind A · utility
1Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1994 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Aug 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A20/124
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to recovery of an aprotic polar solvent from a saline aqueous solution of this solvent, by a process which consists in desalting the said solution by electrodialysis then in distilling the desalted solution. To avoid precipitation of metal hydroxides during the electrodialysis, the brine is kept at an acidic pH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.