Separation of pyridine from water by extractive distillation
US5100514A · kind A · utility
3Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1991 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Mar 1, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D3/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Pyridine cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. Pyridine can be readily separated from water by using azeotropic or extractive distillation. Typical examples of effective agents are: by azeotropic distillation, methyl isoamyl ketone and propylene glycol dimethyl ether; by extractive distillation, isophorone and sulfolane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.