Purification of crude polyalkylene oxide polymers with acid functionalized silicas and metal silicates
US10808076B2 · kind B2 · utility
0Cited by
17References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2018 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Oct 9, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2648
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of purifying a crude polyalkylene oxide polymer that contains a catalyst, such as potassium hydroxide. The method comprises contacting the crude polyalkylene oxide polymer with a composition comprising an acid functionalized silicate, such as an acid functionalized magnesium silicate adsorbent containing at least one acid in an amount effective to remove the catalyst from the polyalkylene oxide polymer. Such a method provides for an improved removal of the catalyst from the polyalkylene oxide polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.