Process for catalyst removal from polyphenylene ether reaction solutions
US4237265A · kind A · utility
14Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1975 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Sep 8, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process is disclosed which is useful in separating the catalyst residue from a polyphenylene ether reaction solution. The process is based on the use of an extracting agent in a liquid-liquid extraction process wherein the aqueous extraction phase is maintained in a continuous phase while the organic phase is maintained as a discrete phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.