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提出了用１，４丁二醇（ＢＤ）作萃取剂对四氢呋喃水恒沸物进行萃取精馏分离，并对溶剂的选择性进行了研究．通过萃取精馏的小试，其产品的纯度可超过９７％．
Propylenediamine (BD) was used as extractant to extract and separate tetrahydrofuran azeotrope. The selectivity of the solvent was also studied. Through the extractive distillation of small test, the purity of their products can exceed 97%.