Preventing solvent of crystallization in production of polyphosphite ligands

防止多亚磷酸酯配体生产中的溶剂结晶

Abstract

Residual wash solvent, e.g., ethyl acetate, is removed from polyphosphite, e.g., bisphosphite, crystals by a process comprising the steps of: A. Mixing the polyphosphite crystals and residual wash solvent with a secondary alcohol, e.g., isopropyl alcohol (IPA), to form a mixture of polyphosphite crystals, residual wash solvent and secondary alcohol, and B. Drying the mixture to remove the residual wash solvent and secondary alcohol to a content of less than 0.5 wt% based on the weight of the polyphosphite crystals.
通过包括以下步骤的方法从多亚磷酸酯(例如,双亚磷酸酯)晶体中除去残余洗涤溶剂(例如,乙酸乙酯):A.将多亚磷酸酯晶体和残余洗涤溶剂与仲醇(例如,异丙醇(IPA))混合,以形成多亚磷酸酯晶体、残余洗涤溶剂和仲醇的混合物,和B.将混合物干燥,以除去残余洗涤溶剂和仲醇至低于0.5重量%的含量,基于多亚磷酸酯晶体的重量。

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