公开(公告)号：US08766029B2

公开(公告)日：2014-07-01

申请号：US13736446

申请日：2013-01-08

Applicant: BASF SE

Inventor： Bernd Heida ,  Randolf Hugo

IPC: C07C7/00

CPC classification number: C07C7/005 ,  C07C7/04 ,  C07C7/08 ,  C07C11/167

Abstract: Mixtures of hydrocarbons predominantly having 4 carbon atoms per molecule known as C4 cuts are used in obtaining crude 1,3-butadiene by a thermal cracking process. Vaporous purified crude C4 cuts are produced from liquid crude C4 cuts, containing butanes, butenes, 1,3-butadiene, C3 hydrocarbons, C4 oligomers and polymers, and C5+ hydrocarbons via an extractive distillation by fist removing the C4 oligomers and polymers and the C5+ hydrocarbons and then vaporizing the liquid crude C4 cut in a vaporizer vessel. The vaporizer vessel is directly or indirectly in contact with a stripping column where liquid C4 cuts are supplied to the upper region, direct gas and liquid exchange with the vaporizer vessel occurs in the lower region, and vaporous purified crude C4 cuts are removed from the top region.

Abstract translation: 用于通过热裂解方法获得粗制1,3-丁二烯的主要用作C4分子的每分子具有4个碳原子的烃的混合物。 气相纯化的粗C4馏分由液体粗C4馏分产生，其中含有丁烷，丁烯，1,3-丁二烯，C3烃，C4低聚物和聚合物以及C5 +烃，通过萃取蒸馏，通过第一次除去C4低聚物和聚合物和C5 + 然后蒸发在蒸发器容器中切割的液体粗C4。 蒸发器容器直接或间接地与汽提塔接触，其中液体C4切割被供应到上部区域，与气化器容器的直接气体和液体交换发生在下部区域，蒸气纯化的粗C4馏分从顶部除去 地区。