公开(公告)号：US20140107378A1

公开(公告)日：2014-04-17

申请号：US14045940

申请日：2013-10-04

Applicant: BASF SE

Inventor： Koenraad VANDEWALLE ,  Karen VERCRUYSSE ,  Leo DENISSEN ,  Filip DEBERDT ,  Hendrik DE WINNE ,  Bart VAN DE VOORDE ,  Michael REISER ,  Samuel NETO

IPC: C07C209/36

CPC classification number: C07C209/36 ,  C07C209/84 ,  C07C211/46

Abstract: A process for obtaining pure aniline contains catalytically hydrogenating nitrobenzene, to obtain a reaction mixture, separating the reaction mixture into a gas phase containing hydrogen and a liquid phase, liquid/liquid phase separating the liquid phase to obtain an aqueous phase and also crude aniline containing water as an organic phase, distillatively pre-purifying the crude aniline by removing the water via an overhead stream of a first distillation column to obtain a first bottom stream, feeding the first bottom stream as a feed stream to a pure column from which a pure aniline stream is taken off at the top and a second bottom stream containing high boilers is taken off, and passing the second bottom stream to incineration, by pumping the second bottom stream through heated pipelines and by adding methanol, ethanol, propanol, and/or acetone to the second bottom stream.

Abstract translation: 获得纯苯胺的方法含有催化氢化硝基苯，得到反应混合物，将反应混合物分离成含有氢和液相的气相，液/液相分离液相，得到含水相和粗苯胺 水作为有机相，通过经由第一蒸馏塔的塔顶物流除去水来蒸馏预纯化粗苯胺，以获得第一底部料流，将第一底部料流作为进料流进料至纯的塔，纯纯 将苯胺流从顶部取出，取出含有高锅炉的第二塔底物流，并将第二塔底物流通过加热的管道，并通过加入甲醇，乙醇，丙醇和/或 丙酮到第二底部流。