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发明公开
CN101001848A 从包含氧化丙烯和甲醇的混合物中分离出氧化丙烯 有权

从包含氧化丙烯和甲醇的混合物中分离出氧化丙烯
摘要：
本发明涉及一种从包含5－50重量％氧化丙烯和50－85重量％甲醇的混合物(M)中分离出氧化丙烯的方法，所述方法包括：(i)将所述混合物(M)引入萃取蒸馏塔中；(ii)另外将极性溶剂引入所述萃取蒸馏塔中；(iii)在40－70℃的底部温度和300－750毫巴的压力下，从所述萃取蒸馏塔顶部蒸出氧化丙烯。
摘要（英）：

A method of separating propylene oxide from a mixture (M) comprising 5 to 50 percent by weight propylene oxide and 50 to 85 percent by weight methanol, said method comprising (i) introducing said mixture (M) into an extractive distillation column; (ii) additionally introducing a polar solvent into said extractive distillation column; (iii) distilling propylene oxide overhead from said extractive distillation column at a bottoms temperature of from 40 to 70 DEG C and at a pressure of from 300 to 750 mbar.

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