Acetaldehyde removal from methyl acetate by distillation at elevated pressure
US8062482B2 · kind B2 · utility
25Cited by
7References
22Claims
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Key dates
| Filing date | Oct 30, 2007 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Mar 5, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for removing acetaldehyde from a mixture of methyl acetate, methanol and acetaldehyde includes: (a) feeding the mixture of methyl acetate, methanol and acetaldehyde to a distillation column; (b) distilling the feed mixture of methyl acetate methanol and acetaldehyde at a pressure of 10 psig or more to generate an overhead vapor stream enriched in acetaldehyde as compared with the feed mixture and a residue stream depleted in acetaldehyde as compared with the feed mixture; and (c) withdrawing the residue stream depleted in acetaldehyde from the distillation column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.