Separation of methylene chloride from ethyl vinyl ether by extractive distillation
US5124005A · kind A · utility
2Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1991 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Apr 25, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methylene chloride cannot be completely separated from ethyl vinyl ether by conventional distillation or rectification because of the minimum boiling azeotrope. Methylene chloride can be readily separated from ethyl vinyl ether by extractive distillation. Typical effective agents are ethylene glycol methyl ether acetate, 2-hexanone and 1-nitropropane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.