Process for preparing refined acrylic esters
US5968322A · kind A · utility
5Cited by
9References
12Claims
0Family size
Inventors
Key dates
| Filing date | Nov 26, 1997 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Nov 26, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing refined acrylic esters, the process including steps of distilling an acrylic ester containing stream in the presence of hydroquinone or substituted hydroquinone, at a concentration in the range of 200 to 5000 ppmw, wherein the distillation is carried out in the presence of 0.001 to 1.0 % v, on the vapor phase, of oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.