Use of mixed polyoxypropylene glycols in the extractive distillation of propylene oxide
US5453160A · kind A · utility
4Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1994 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/09
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An extractive distillation agent comprising a mixture of polyoxypropylene glycols is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead distillate anhydrous propylene oxide fraction contaminated with reduced quantities of methanol and a heavier bottoms distillation fraction containing the polyoxypropylene glycols, water and acetone and some of the methanol introduced into the distillation column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.