Polyol purification
US6060627A · kind A · utility
3Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A water and allylic compound containing propoxylated glycerin stream is reduced in water content by evaporation and flashed at reduced pressure and elevated temperature to reduce the water content to 1000 ppm or less, and thereafter stripping allylic impurities from the propyxylated glycerin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.