Method and apparatus for preparing a dialkyl carbonate
US6977308B2 · kind B2 · utility
1Cited by
16References
31Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 2, 2003 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Aug 9, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C68/01
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of preparing a dialkyl carbonate includes reacting an alkanol, oxygen, carbon monoxide, and a catalyst to form a mixture that includes a dialkyl carbonate and an alkyl chloroformate. The mixture is separated into a liquid fraction and a gaseous fraction, and alkyl chloroformate is removed from the gaseous fraction. Also described is an apparatus for carrying out the method. The method is particularly useful for preventing corrosion in a cold wash unit that removes further organic impurities from the gaseous fraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.