Purification of 2-oxazolines
US4281137A · kind A · utility
2Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1980 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Feb 20, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D263/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Residual amounts of water and color-causing impurities can be removed from a 2-oxazoline compound by introducing from 0.01 to 25 weight percent of a dialkyl hydrogen phosphite or a halosilane compound to the 2-oxazoline and then distilling the oxazoline. For example, 0.5 weight percent of bis(2-ethylhexyl)hydrogen phosphite was introduced into 100 grams of 2-ethyl-2-oxazoline containing 1000 parts per million (ppm) of water and the mixture was then distilled to yield 2-ethyl-2-oxazoline containing less than 10 ppm of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.