Use of propylene oxide adducts in the purification of propylene oxide by extractive distillation
US5464505A · kind A · utility
5Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1994 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D3/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Propylene oxide adducts of oxyethylene glycols are used as extractive distillation agents in an extractive distillation column in the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead propylene oxide distillate fraction contaminated with reduced quantities of water, acetone and methanol, and a heavier bottoms distillation fraction containing substantially all of the extractive distillation agent, and acetone and some of the methanol and water introduced into the distillation column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.