Integrated process for preparing dialkyl carbonates with a circulating catalyst
US7084292B2 · kind B2 · utility
2Cited by
15References
16Claims
0Family size
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Key dates
| Filing date | Jun 22, 2001 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Jun 22, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol is described in which an alkylene oxide is first reacted with carbon dioxide in the presence of a homogeneous carbonation catalyst to provide a corresponding cyclic carbonate and the cyclic carbonate is then reacted with an aliphatic monohydric alcohol in the presence of the homogeneous carbonation catalyst and/or a heterogeneous transesterification catalyst and recycling the homogeneous carbonation catalyst to provide a corresponding dialkyl carbonate and diol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.