process for recovery of solvent from the raffinate of a selective extractive distillation

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  机译： 萃余液萃取蒸馏中选择性回收溶剂的方法

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  机译： 通过使用选择性溶剂的萃取蒸馏将c4馏分分离到萃取蒸馏塔，萃取蒸馏塔的连续过程以及进一步的物流加工方法（c4h8）

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  机译： 通过以正取代吗啉为选择性溶剂的萃取和/或萃取蒸馏回收纯烃的方法

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