公开(公告)号：EP3177588A1

公开(公告)日：2017-06-14

申请号：EP15744265.8

申请日：2015-08-04

申请人： BP Chemicals Limited

发明人： HENNIGAN, Sean Anthony

IPC分类号： C07C51/44 ,  C07C53/08 ,  C07C51/12

CPC分类号： C07C51/44 ,  C07C51/12 ,  C07C53/08 ,  C07C53/122

摘要： Method of operating a heavy ends column in an acetic acid production unit having a reaction section, a light ends recovery section including a light ends distillation column, and a heavy ends column. A stream containing acetic acid and propionic acid obtained from the light ends recovery section is fed to the heavy ends column through a feed inlet positioned at an intermediate point in the heavy ends column. A product stream containing acetic acid is withdrawn from the heavy ends column through a sidedraw product outlet position above the feed inlet, and a product stream containing the propionic acid is withdrawn from the heavy ends column through a heavy product outlet positioned below the feed inlet. The pressure in the heavy ends column above the feed inlet is lower than the pressure of the stream containing acetic acid and propionic acid that is fed to the heavy ends column.

摘要翻译： 一种在乙酸生产单元中操作重尾馏分塔的方法，所述生产单元至少包括反应段，包含轻馏分蒸馏塔的轻馏分回收段和重尾馏分塔，其中包含乙酸和 从轻馏分回收部分获得的丙酸通过位于重馏分塔中间点的进料入口进料至重馏分塔，主要包含乙酸的产物流通过侧馏分产物出口从重馏分塔排出 位置位于进料入口上方，并且包含丙酸的产物料流通过位于进料入口下方的重产物出口从重馏分塔中排出，其中重馏分塔在使得重馏分塔中的压力 进料口上方的压力低于加入到进料口的包含乙酸和丙酸的物流的压力 重尾馏分塔，并且其中重尾馏分塔的顶部压力低于1.0巴，进料入口和侧馏出物出口之间的理论分离阶段的数量至少为5，优选至少7，更优选至少10， 并且进料入口和侧馏出口出口之间的重馏分塔部分中的压降最大为每理论分离阶段10毫巴。

公开(公告)号：EP2373607A1

公开(公告)日：2011-10-12

申请号：EP09796032.2

申请日：2009-12-23

申请人： BP Chemicals Limited

发明人： HENNIGAN, Sean Anthony ,  JEFFERS, David Edward George ,  SELLERS, Martin John ,  SMITH, Stephen James ,  WILSON, Peter John

IPC分类号： C07C45/83 ,  C07C49/08

CPC分类号： C07C45/83 ,  C07C49/08

摘要： The present invention relates to a separation process for removing acetone from a mixture comprising acetone, methyl acetate and methyl iodide, said process comprising the steps of: (a) introducing said stream comprising acetone, methyl acetate and methyl iodide into a first distillation zone; (b) introducing acetic acid into said first distillation zone, either by addition of acetic acid to said stream comprising acetone, methyl acetate and methyl iodide or by introduction of acetic acid directly to the first distillation zone at one or more points at or above the point of introduction of said stream comprising acetone, methyl acetate and methyl iodide into the first distillation zone in step (a), or a combination of both; (c) removing from the first distillation zone an overhead stream comprising methyl iodide and a bottoms stream comprising acetone, methyl acetate, acetic acid, and a reduced amount of methyl iodide; (d) introducing into a second distillation zone the bottoms stream from step (c); (e) removing from the second distillation zone an overhead stream comprising methyl acetate and methyl iodide and a bottoms stream comprising acetone, methyl acetate and acetic acid; (f) introducing the bottoms stream from step (e) into a third distillation zone; and (g) removing from the third distillation zone an overhead stream comprising methyl acetate and acetone and a bottoms stream comprising methyl acetate and acetic acid.