Ammonium Salts with Polyether-Tail: New Ionic Liquids for Rhodium Catalyzed Two-Phase Hydroformylation of 1-Tetradecene

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By attaching the polyether chains to ammonium salts, a novel class of ionic liquid termed polyether melt is prepared. Such polyether melt contains no fluoride and hence is environmentally more benign. Applying this polyether melt as a polar phase, the hydroformylation of 1-tetradecene catalyzed by Rh complex catalyst in two-phase medium was investigated. The rhodium catalyst immobilized in this polyether melt is readily separated from the aldehyde product phase by decantation and has been reused for seven times without obvious loss of activity.

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