A process for producing a purified conjugated diene, comprising a step of isolating a conjugated diene from a petroleum fraction containing the conjugated diene by extractive distillation, the step comprising:
(1) using an amide compound as an extraction solvent,
(2) feeding the extraction solvent to an extractive distillation column, said extraction solvent having been adjusted in such a manner that water is present within a range of 50 to 1,000 ppm based on the extraction solvent, and
(3) subjecting the petroleum fraction to extractive distillation within the extractive distillation column.
一种生产纯化共轭二烯的工艺,包括通过萃取蒸馏从含有共轭二烯的石油馏分中分离共轭二烯的步骤,该步骤包括
(1) 使用酰胺化合物作为萃取溶剂、
(2) 将萃取溶剂送入萃取蒸馏塔,所述萃取溶剂经过调整,使
水的含量在萃取溶剂的基础上介于 50 至 1,000 ppm 之间,以及
(3) 在萃取蒸馏塔中对石油馏分进行萃取蒸馏。