Isolation of butadiene from a C.sub.4 -hydrocarbon mixture
    11.
    发明授权
    Isolation of butadiene from a C.sub.4 -hydrocarbon mixture 失效
    从C4烃混合物中分离丁二烯

    公开(公告)号:US4292141A

    公开(公告)日:1981-09-29

    申请号:US68741

    申请日:1979-08-22

    CPC分类号: C07C7/005

    摘要: A process for isolating butadiene, with the aid of a selective solvent, from a C.sub.4 -hydrocarbon mixture which contains butadiene and small amounts of styrene and may contain oxygen, hydrocarbons more soluble than butadiene in the selective solvent and hydrocarbons less soluble than butadiene in the selective solvent, in which process the C.sub.4 -hydrocarbon mixture is separated by extractive distillation into a distillate which contains the less soluble hydrocarbons, a stream of butadiene and a stream containing the more soluble hydrocarbons, and in which a mixture of styrene and C.sub.4 -hydrocarbons is removed from the C.sub.4 -hydrocarbon mixture in a distillation zone upstream of the extractive distillation, the top product of the said distillation zone being fed to the extractive distillation.

    摘要翻译: 在选择性溶剂的帮助下,从含有丁二烯和少量苯乙烯的C4-烃混合物中分离丁二烯的方法,并且可以含有氧,在选择性溶剂中比丁二烯更可溶的烃和比丁二烯更难溶解的烃 选择性溶剂,其中C4烃混合物通过萃取蒸馏分离成含有较少可溶性烃的馏出物,丁二烯流和含有较可溶性烃的物流,其中苯乙烯和C 4烃的混合物 在萃取蒸馏上游的蒸馏区中从C4烃混合物中除去,将所述蒸馏区的顶部产物进料至萃取蒸馏。