Method of recovering fluorochemical surfactant
US6972094B2 · kind B2 · utility
17Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2001 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | Mar 28, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2301/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Upon recovering a fluorochemical surfactant from a fluorochemical-containing aqueous solution, there is provided a method for recovering the fluorochemical surfactant from the aqueous solution containing the surfactant. In the method, the fluorochemical surfactant is recovered by subjecting the aqueous solution containing the fluorochemical surfactant to a filtration treatment step with a reverse osmosis membrane so as to obtain from the aqueous solution, a concentrated aqueous solution in which the concentration of the fluorochemical surfactant is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.