Process for continuous preparation of polyphenylene oxide in agitated reaction zones
US4675377A · kind A · utility
34Cited by
1References
23Claims
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Key dates
| Filing date | Apr 7, 1986 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Apr 7, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyphenylene oxides are prepared by the catalytic reaction of oxygen with a monohydroxyaromatic compound such as 2,6-xylenol in a continuous-flow tubular reactor containing multiple agitated zones. In the case of a copper catalyst system, it is often preferred to pre-mix the non-gaseous constituents of the reaction mixture in an inert atmosphere, and also to use a reactor with various agitator and zone dimensions in various regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.