Purification of quinones
US5180842A · kind A · utility
0Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Aug 16, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C46/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for removing chlorine-containing impurities from quinone compounds such as p-bezonquinone. The process involves extracting a quinone compound containing 1000 ppm or more chlorine with heptane, cyclohexane or a mixture thereof and separating the quinone compound from the extraction mixture. The process provides a means for obtaining quinone compounds containing 50 ppm or less chlorine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.