Separation of propylene glycol from ethylene glycol by azeotropic distillation
US5425853A · kind A · utility
13Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Jun 30, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C31/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Propylene glycol is difficult to separate from ethylene glycol by conventional distillation or rectification because of the proximity of their boiling points. Propylene glycol can be readily separated from ethlene glycol by azeotropic distillation. Effective agens are m-diisopropyl benzene, 1-octene, 3-carene and myrcene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.