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Process for the preparation of dialkyl carbonate
Published online: Apr 27, 2009
| Geographical region | USA |
|---|---|
| Subject | Dialkyl carbonates production |
| Issue date | Apr 14, 2009 |
| Title | Process for the preparation of dialkyl carbonate |
| Patent Number | US7518012 B2 |
| Patent Application Number | US20070083062 A1 |
| Assignee | Council of Scientific & Industrial Research, India |
| Relevance | An efficient process for producing dialkyl carbonates from cyclic carbonate using double metal cyanide catalyst. |
| Type of claims | Grant |
| Overview | This patent discloses an atom-efficient process for producing dialkyl carbonate [R=alkyl (C1-C8) or C6H5CH2] from cyclic carbonate such as propylene carbonate, chloropropylene carbonate using an efficient heterogenous catalyst under moderate reaction conditions. The advantage of this process includes higher conversion accompanied with high selectivity for alkyl carbonates, eco-friendly, non-hazardous route avoiding the using of toxic-chemicals, reuse of catalyst in several recycling experiments without significant loss in activity/selectivity. The process comprises, A) reacting a cyclic carbonate with an alcohol, in the presence of a solid, double metal cyanide complex catalyst, at a temperature in the range of 140°-180° C, for a period of 4-10 hrs and B) separating the catalyst from the reaction mixture by GC analysis or column chromatography methods to obtain the desired product. |
| Related patent documents |
US Patent publications
US6835858 - Catalytic conversion of an organic carbonate (2004)
Not Listed |
| Patent Document | Full Patent Document [external link] |
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