High-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether and preparation method
US11845831B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 6, 2022 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Dec 6, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Related are a high-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether and a preparation method. During preparation, an allyl alcohol raw material and a supported catalyst Rb-NHPA are firstly added into a high-pressure reaction kettle, and it is heated after being replaced with a nitrogen gas; then after the internal temperature of the reaction kettle is raised to a reaction temperature, an ethylene oxide (EO) and propylene oxide (PO) mixture is continuously fed for a reaction; and finally, after the internal temperature of the reaction kettle is reduced, an acetic acid is dropwise added into the reaction kettle so that the crude product of the high-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether is neutralized to be neutral. The refining process of a polyether is omitted, the process flow is greatly simplified, and the process time is effectively saved. In addition, the supported catalyst Rb-NHP may be recycled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.