Liquid Poly(ethylene glycol) and Supercritical Carbon Dioxide: A Benign Biphasic Solvent System for Use and Recycling of Homogeneous Catalysts

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• 作者：David J. Heldebrant and Philip G. Jessop
• 刊名：Journal of the American Chemical Society
• 出版年：2003
• 出版时间：May 14, 2003
• 年：2003
• 卷：125
• 期：19
• 页码：5600 - 5601
• 全文大小：134K
• 年卷期：v.125,no.19(May 14, 2003)
• ISSN：1520-5126

文摘

Poly(ethylene glycol) (PEG), having a molecular weight of 900 or 1500, is a solid at room temperature but a nonvolatile liquid at 40 C under CO₂ pressure. Homogeneously catalyzed hydrogenation can be performed in the molten PEG, followed by extraction of the product by supercritical CO₂. The catalyst-containing PEG phase which remains in the vessel can be reused for hydrogenation without addition of further catalyst or PEG.