Method for removing acidic and salt impurities from an aqueous condensed phase containing dimethylcarbonate
US5685957A · kind A · utility
8Cited by
4References
8Claims
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Key dates
| Filing date | May 31, 1995 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | May 31, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/90
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Acidic and salt impurities are removed from a condensed phase obtained from dimethyl carbonate synthesis by obtaining the condensed phase from the effluent of a reactor in which carbon monoxide, oxygen and methanol are reacted to form dimethyl carbonate, the condensed phase containing acid and salt impurities, and partially evaporating the condensed phase in an evaporator thereby preparing an evaporated stream substantially free of impurities and a residual bottom stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.