Integrated process for preparing dialkyl carbonates and diols
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United States of America Patent
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Jun 18, 2002
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app pub date -
Nov 19, 1999
filing date -
Nov 19, 1999
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Expired
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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 carbonation catalyst to provide a corresponding cyclic carbonate and impurities and the cyclic carbonate, which contains the impurities, is then reacted with an aliphatic monohydric alcohol in the presence of a transesterification catalyst to provide a corresponding dialkyl carbonate and diol.
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