Method for concentrating aqueous tetrafluoroethylene emulsion by electrodialysis and its apparatus
US6045675A · kind A · utility
0Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1998 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Mar 19, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method and an apparatus for concentrating an aqueous PTFE emulsion in which a raw, aqueous PTFE emulsion containing fluorinated surfactants is concentrated by an electrodialysis technique using at least one nonionic surfactant as an anti-flocculation agent and a volatile electrolyte such that the formation of floccules is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.