公开(公告)号：US20120215012A1

公开(公告)日：2012-08-23

申请号：US13505022

申请日：2009-10-30

申请人： Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Chiaki Watanabe ,  Tetsuji Harigai

发明人： Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Chiaki Watanabe ,  Tetsuji Harigai

IPC分类号： C07D307/08 ,  B01D3/14

CPC分类号： C07D307/08 ,  C07B63/00

摘要： A method for purifying tetrahydrofuran from a liquid containing tetrahydrofuran and as impurities at least water, 2,5-dihydrofuran and butanol, the method comprising: a first distillation step in which the liquid is subjected to distillation using a distillation column to separate into a first bottoms product containing water as a major component and a first distillate containing tetrahydrofuran, 2,5-dihydrofuran and butanol as major components, a second distillation step in which the first distillate is subjected to distillation using a distillation column to separate into a second bottoms product containing tetrahydrofuran and butanol as major components and a second distillate containing 2,5-dihydrofuran as a major component, a third distillation step in which the second bottoms product is subjected to distillation using a distillation column to separate into a third bottoms product containing butanol as a major component and a third distillate containing tetrahydrofuran as a major component, and further comprising a recirculation step in which a part of the second top liquid is recirculated into the first distillation step as a recirculation liquid and the remaining part is discharged into the outside of the system.

摘要翻译： 一种从含有四氢呋喃的液体中提取四氢呋喃的方法，至少是水，2,5-二氢呋喃和丁醇作为杂质，该方法包括：第一蒸馏步骤，其中使用蒸馏塔对液体进行蒸馏以分离成第一 含有水作为主要组分的底部产物和含有四氢呋喃，2,5-二氢呋喃和丁醇作为主要组分的第一馏出物，第二蒸馏步骤，其中第一馏出物使用蒸馏塔进行蒸馏以分离成第二塔底产物 含有四氢呋喃和丁醇作为主要组分的第二馏出物和含有2,5-二氢呋喃作为主要组分的第二馏出物，第三蒸馏步骤，其中使用蒸馏塔对第二塔底产物进行蒸馏以分离成含有丁醇的第三底部产物 主要组分和第三馏出物，其中四氢呋喃为主要成分 并且还包括再循环步骤，其中所述第二顶部液体的一部分作为再循环液体再循环到所述第一蒸馏步骤中，并且所述剩余部分被排出到所述系统的外部。