Partial oxidation of polyoxyalkylene polyol compositions to polycarboxylic acid compositions
US6235931A · kind A · utility
13Cited by
28References
61Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for partially oxidizing and converting a polyoxyalkylene polyol composition to a polycarboxylic acid composition comprising reacting a polyoxyalkylene polyol composition with a stable free radical nitroxide in the presence of an NO.sub.x generating compound, a flow of air or oxygen, and optionally water, at elevated temperatures. The oxidation reaction is discontinued by deactivating the catalyst and removing the source of air or oxygen, the NO.sub.x generating source, and the optional water. From 60% to no more than 95% of the polyoxyalkylene polyol composition is converted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.