Process for removing contaminants from dialkyl ethers of polyalkylene glycols
US4859802A · kind A · utility
3Cited by
12References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Mar 4, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is described for removing contaminants from a contaminant-laden solution of dialkyl ethers of polyethylene glycols (polyether solvent) by mixing the solution with an aqueous base solution. The mixture produces at least two liquid phases of different densities, which are then separated from each other. The lighter liquid phase is predominantly the polyether solvent while the heavier liquid phase is predominantly the aqueous base solution and the contaminants. The process is particularly useful in removing triethylene glycol and other glycol-based dehydration solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.