公开(公告)号：US20130046122A1

公开(公告)日：2013-02-21

申请号：US13513892

申请日：2010-12-15

申请人： Walter Vermeiren ,  François Bouvart ,  Ineke Celie ,  Wolfgang Garcia

发明人： Walter Vermeiren ,  François Bouvart ,  Ineke Celie ,  Wolfgang Garcia

IPC分类号： C07C5/02

CPC分类号： C10G51/04 ,  C10G9/002 ,  C10G69/06 ,  C10G2300/807 ,  C10G2400/20 ,  C10G2400/26

摘要： The present invention is method for debottlenecking an existing steam cracker unit of which the operation is modified from high severity to low severity operation, having a cracking zone and a fractionation zone, said fractionation zone comprising a gasoline stripper, a de-methaniser (I), a de-ethaniser (I) a de-propaniser (I) and a de-butaniser (I), said de-propaniser (I) receiving product from the bottom of the de-ethaniser (I) and optionally product from the bottom of the gasoline stripper (I), wherein said debottlenecking method comprises the steps of: a) adding a selective hydrogenation unit (II), b) adding a cracking reactor (II) comprising a catalyst selective towards light olefins in the outlet, c) adding a re-run column and a de-propaniser (II), d) sending a part or all of the bottoms stream of the gasoline stripper (I) to the selective hydrogenation unit (II) and subsequently to the cracking reactor (II) at conditions effective to produce an outlet with an olefin content of lower molecular weight than that of the inlet, e) sending a part of the bottoms stream of the de-ethaniser (I) to the de-propaniser (II), such as, not to overload the de-propaniser (I) f) optionally sending a part or all of the overhead raw C4 fraction of the de-butaniser (I) to the selective hydrogenation unit (II), g) sending the cracking reactor (II) outlet to the re-run column to produce a C6+ bottom stream and a C1-C5 overhead, sending said overhead to the de-propaniser (II) to produce a C1-C3 overhead and a C4+ bottom stream recycled in whole or in part to the selective hydrogenation unit (II), optionally withdrawing a part of said C4+ bottom stream.

摘要翻译： 本发明是用于对现有的蒸汽裂解装置进行脱瓶的方法，其中操作由高严重​​度到低严重度操作改变，具有裂化区和分馏区，所述分馏区包含汽提汽提塔，脱甲烷反应器（I） （I）脱乙烷醇（I）和脱丁烷（I）的脱乙烷醇（I），脱丙烷（I）从脱乙烷醚（I）的底部接收产物，并且任选地从底部产物 其中所述脱瓶方法包括以下步骤：a）加入选择性氢化单元（II），b）在出口中加入包含对轻质烯烃选择性的催化剂的裂解反应器（II），c） 加入一个再运行的塔和一个脱丙烷醚（II），d）将汽油汽提塔（I）的一部分或全部塔底物流送到选择性加氢单元（II），然后送到裂解反应器（II） 在有效产生烯烃含量为l的出口的条件下 e）将脱乙烷醚（I）的一部分底部物流送到去岐化器（II），例如不会使去岐化剂（I）过载f） 任选地将脱丁烷（I）的部分或全部原料C4馏分送入选择性氢化单元（II），g）将裂解反应器（II）出口送至再运行塔以产生C6 +底 将所述开销发送到去推进器（II）以产生C1-C3塔顶馏出物，以及将全部或部分再循环到选择性加氢装置（II）的C4 +塔底馏分，任选地将部分 的所述C4 +底部流。