Purification of a methanol stream
US5863391A · kind A · utility
4Cited by
14References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1997 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Aug 15, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Acetaldehyde may be effectively removed from a contaminated methanol stream using a distillation method wherein a solvent stream containing a relatively heavy polar compound such as water or propylene glycol is utilized as an extractive distillation solvent. Following the separation of the polar compound from the bottoms stream obtained by extractive distillation, the purified methanol may be recycled for use as a reaction solvent in an olefin epoxidation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.